diff --git a/recipe_modules/checkout/api.py b/recipe_modules/checkout/api.py
index caa86c0..9b0202b 100644
--- a/recipe_modules/checkout/api.py
+++ b/recipe_modules/checkout/api.py
@@ -106,6 +106,7 @@
     base = attr.ib(converter=_str_or_none, default=None)
     base_type = attr.ib(converter=_str_or_none, default=None)
     is_merge = attr.ib(type=bool, default=False)
+    commit_message = attr.ib(type=str, default='')
 
     @property
     def gerrit_url(self):
@@ -433,7 +434,9 @@
                 {
                     'branch': 'main',
                     'current_revision': 'f' * 40,
-                    'revisions': {'f' * 40: {'commit': {'parents': [{}],},},},
+                    'revisions': {
+                        'f' * 40: {'commit': {'parents': [{}], 'message': '',},}
+                    },
                 }
             ),
         ).json.output
@@ -456,6 +459,7 @@
             branch=branch,
             gerrit_name=gerrit_name,
             submitted=False,
+            commit_message=current_revision['commit']['message'],
         )
 
     def _process_gerrit_changes(self, ctx, bb_input):
diff --git a/recipe_modules/checkout/test_api.py b/recipe_modules/checkout/test_api.py
index ae9640d..54b61f2 100644
--- a/recipe_modules/checkout/test_api.py
+++ b/recipe_modules/checkout/test_api.py
@@ -174,7 +174,7 @@
         )
 
     def cl_branch_parents(
-        self, branch='main', num_parents=1, index=0, name='pigweed',
+        self, branch='main', num_parents=1, index=0, name='pigweed', message='',
     ):
         return self.override_step_data(
             'checkout {}.change data.process gerrit changes.{}.details'.format(
@@ -189,6 +189,7 @@
                         * 40: {
                             'commit': {
                                 'parents': [None for _ in range(num_parents)],
+                                'message': message,
                             },
                         },
                     },
diff --git a/recipe_modules/checkout/tests/git.expected/ci.json b/recipe_modules/checkout/tests/git.expected/ci.json
index 5da868e..4f1bad1 100644
--- a/recipe_modules/checkout/tests/git.expected/ci.json
+++ b/recipe_modules/checkout/tests/git.expected/ci.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1095,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/git.expected/not_in_gerrit.json b/recipe_modules/checkout/tests/git.expected/not_in_gerrit.json
index 5dd5264..0698ad6 100644
--- a/recipe_modules/checkout/tests/git.expected/not_in_gerrit.json
+++ b/recipe_modules/checkout/tests/git.expected/not_in_gerrit.json
@@ -151,7 +151,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=0, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=0, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -679,7 +679,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=0, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=0, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/git.expected/other.json b/recipe_modules/checkout/tests/git.expected/other.json
index f056786..1d9b2f5 100644
--- a/recipe_modules/checkout/tests/git.expected/other.json
+++ b/recipe_modules/checkout/tests/git.expected/other.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/git.expected/try.json b/recipe_modules/checkout/tests/git.expected/try.json
index fb55ccd..a2f2b08 100644
--- a/recipe_modules/checkout/tests/git.expected/try.json
+++ b/recipe_modules/checkout/tests/git.expected/try.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null, @@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
@@ -407,7 +408,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=False, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=True)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=False, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=True, commit_message='')@@@"
     ]
   },
   {
@@ -1336,7 +1337,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=False, branch='main', gerrit_name='pigweed', submitted=False, base='MERGEBASE_MERGEBASE_MERGEBASE_MERGEBASE_', base_type='merge-base', is_merge=True)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=False, branch='main', gerrit_name='pigweed', submitted=False, base='MERGEBASE_MERGEBASE_MERGEBASE_MERGEBASE_', base_type='merge-base', is_merge=True, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/ci.json b/recipe_modules/checkout/tests/repo.expected/ci.json
index 58a67bc..05cf30b 100644
--- a/recipe_modules/checkout/tests/repo.expected/ci.json
+++ b/recipe_modules/checkout/tests/repo.expected/ci.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -605,7 +605,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -722,7 +722,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/feature_branches_ci.json b/recipe_modules/checkout/tests/repo.expected/feature_branches_ci.json
index f2d4a06..6858a20 100644
--- a/recipe_modules/checkout/tests/repo.expected/feature_branches_ci.json
+++ b/recipe_modules/checkout/tests/repo.expected/feature_branches_ci.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pinned', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='feature1', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pinned', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='feature1', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -884,7 +884,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pinned', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='feature1', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pinned', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='feature1', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1070,7 +1070,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pinned', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='feature1', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pinned', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='feature1', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/feature_branches_try.json b/recipe_modules/checkout/tests/repo.expected/feature_branches_try.json
index cd9906b..7a8c1e8 100644
--- a/recipe_modules/checkout/tests/repo.expected/feature_branches_try.json
+++ b/recipe_modules/checkout/tests/repo.expected/feature_branches_try.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1148,7 +1149,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1334,7 +1335,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_features.json b/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_features.json
index cb6b0b8..66aa66e 100644
--- a/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_features.json
+++ b/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_features.json
@@ -182,6 +182,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -244,6 +245,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -469,7 +471,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -477,7 +479,7 @@
     "name": "checkout pigweed.change data.changes.default:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1520,7 +1522,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1706,7 +1708,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1714,7 +1716,7 @@
     "name": "changes.1",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_matches.json b/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_matches.json
index 6bd4808..433b5e6 100644
--- a/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_matches.json
+++ b/recipe_modules/checkout/tests/repo.expected/feature_branches_try_multiple_matches.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -243,6 +244,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -468,7 +470,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -476,7 +478,7 @@
     "name": "checkout pigweed.change data.changes.default:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/feature_branches_try_no_matching.json b/recipe_modules/checkout/tests/repo.expected/feature_branches_try_no_matching.json
index f4efd96..ceeef9a 100644
--- a/recipe_modules/checkout/tests/repo.expected/feature_branches_try_no_matching.json
+++ b/recipe_modules/checkout/tests/repo.expected/feature_branches_try_no_matching.json
@@ -182,6 +182,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -244,6 +245,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -469,7 +471,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -477,7 +479,7 @@
     "name": "checkout pigweed.change data.changes.default:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1429,7 +1431,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1615,7 +1617,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='feature1', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1623,7 +1625,7 @@
     "name": "changes.1",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='feature2', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/no_trigger.json b/recipe_modules/checkout/tests/repo.expected/no_trigger.json
index d7455c5..56cd9e0 100644
--- a/recipe_modules/checkout/tests/repo.expected/no_trigger.json
+++ b/recipe_modules/checkout/tests/repo.expected/no_trigger.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -605,7 +605,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -719,7 +719,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/prefix.json b/recipe_modules/checkout/tests/repo.expected/prefix.json
index ec7529b..3cda389 100644
--- a/recipe_modules/checkout/tests/repo.expected/prefix.json
+++ b/recipe_modules/checkout/tests/repo.expected/prefix.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.foo:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://foo.googlesource.com/prefix/suffix', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://foo.googlesource.com/prefix/suffix', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1096,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://foo.googlesource.com/prefix/suffix', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://foo.googlesource.com/prefix/suffix', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1281,7 +1282,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://foo.googlesource.com/prefix/suffix', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://foo.googlesource.com/prefix/suffix', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/try-multiple-cqdeps.json b/recipe_modules/checkout/tests/repo.expected/try-multiple-cqdeps.json
index 3e66035..23fc6ca 100644
--- a/recipe_modules/checkout/tests/repo.expected/try-multiple-cqdeps.json
+++ b/recipe_modules/checkout/tests/repo.expected/try-multiple-cqdeps.json
@@ -182,6 +182,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -609,6 +610,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -642,7 +644,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -650,7 +652,7 @@
     "name": "checkout pigweed.change data.changes.default:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1602,7 +1604,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1790,7 +1792,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1798,7 +1800,7 @@
     "name": "changes.1",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/try-multiple-onenotapplied.json b/recipe_modules/checkout/tests/repo.expected/try-multiple-onenotapplied.json
index 39346f3..dd3648e 100644
--- a/recipe_modules/checkout/tests/repo.expected/try-multiple-onenotapplied.json
+++ b/recipe_modules/checkout/tests/repo.expected/try-multiple-onenotapplied.json
@@ -184,6 +184,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -246,6 +247,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -308,6 +310,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -533,7 +536,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -541,7 +544,7 @@
     "name": "checkout pigweed.change data.changes.default:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -549,7 +552,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:3456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/project-that-is-not-in-the-manifest', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/project-that-is-not-in-the-manifest', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1519,7 +1522,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied [Change(number=3456, remote='https://pigweed.googlesource.com/project-that-is-not-in-the-manifest', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)]@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied [Change(number=3456, remote='https://pigweed.googlesource.com/project-that-is-not-in-the-manifest', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')]@@@"
     ]
   },
   {
@@ -1707,7 +1710,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1715,7 +1718,7 @@
     "name": "changes.1",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1723,7 +1726,7 @@
     "name": "changes.2",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/project-that-is-not-in-the-manifest', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/project-that-is-not-in-the-manifest', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/try-multiple.json b/recipe_modules/checkout/tests/repo.expected/try-multiple.json
index 8e601e0..d3445f8 100644
--- a/recipe_modules/checkout/tests/repo.expected/try-multiple.json
+++ b/recipe_modules/checkout/tests/repo.expected/try-multiple.json
@@ -182,6 +182,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -244,6 +245,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -469,7 +471,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -477,7 +479,7 @@
     "name": "checkout pigweed.change data.changes.default:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1429,7 +1431,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1617,7 +1619,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1625,7 +1627,7 @@
     "name": "changes.1",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://default.googlesource.com/default_name', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='default', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/try.json b/recipe_modules/checkout/tests/repo.expected/try.json
index a0bb344..1908a3d 100644
--- a/recipe_modules/checkout/tests/repo.expected/try.json
+++ b/recipe_modules/checkout/tests/repo.expected/try.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1096,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1283,7 +1284,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed_name', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/try_manifest.json b/recipe_modules/checkout/tests/repo.expected/try_manifest.json
index a9fab74..1a6a6e1 100644
--- a/recipe_modules/checkout/tests/repo.expected/try_manifest.json
+++ b/recipe_modules/checkout/tests/repo.expected/try_manifest.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='refs/changes/56/123456/7', rebase=True, branch='feature-not-in-manifest', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='refs/changes/56/123456/7', rebase=True, branch='feature-not-in-manifest', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1165,7 +1166,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='refs/changes/56/123456/7', rebase=True, branch='feature-not-in-manifest', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='refs/changes/56/123456/7', rebase=True, branch='feature-not-in-manifest', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
@@ -1353,7 +1354,7 @@
     "name": "changes.0",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='refs/changes/56/123456/7', rebase=True, branch='feature-not-in-manifest', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='refs/changes/56/123456/7', rebase=True, branch='feature-not-in-manifest', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/repo.expected/try_repo_not_in_manifest.json b/recipe_modules/checkout/tests/repo.expected/try_repo_not_in_manifest.json
index d1b2556..995cd65 100644
--- a/recipe_modules/checkout/tests/repo.expected/try_repo_not_in_manifest.json
+++ b/recipe_modules/checkout/tests/repo.expected/try_repo_not_in_manifest.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.foo:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://foo.googlesource.com/bar', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://foo.googlesource.com/bar', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='foo', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-ci.json b/recipe_modules/checkout/tests/submodule.expected/submodule-ci.json
index a926936..e2d1086 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-ci.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-ci.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.x:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/b/c/d', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='x', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/b/c/d', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='x', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1097,7 +1097,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/b/c/d', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='x', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/b/c/d', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='x', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-match.json b/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-match.json
index 4e0a001..c6125e6 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-match.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-match.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.x:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1329,7 +1330,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-nomatch.json b/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-nomatch.json
index effb993..a62d4c3 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-nomatch.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-nomatch.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.x:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-twomatch.json b/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-twomatch.json
index b858370..2e7a99d 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-twomatch.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-repeated-twomatch.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.x:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-equivalent.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-equivalent.json
index b9ee7ec..7cf75fd 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-equivalent.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-equivalent.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.z:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://z.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='z', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://z.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='z', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1361,7 +1362,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://z.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='z', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://z.googlesource.com/foo', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='z', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded-missing.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded-missing.json
index 5f2f8b6..6d9d67c 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded-missing.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded-missing.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded.json
index e71617b..f16bacd 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-excluded.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1101,7 +1101,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-included-excluded.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-included-excluded.json
index 30aa18a..bca3233 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-included-excluded.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-included-excluded.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-included.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-included.json
index 137b780..e9a9a03 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-included.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-included.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1068,7 +1068,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-cqdeps.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-cqdeps.json
index 54a5bcf..caaac4a 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-cqdeps.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-cqdeps.json
@@ -183,6 +183,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -790,6 +791,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -845,6 +847,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -878,7 +881,7 @@
     "name": "checkout pigweed.change data.changes.x:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -886,7 +889,7 @@
     "name": "checkout pigweed.change data.changes.x:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -894,7 +897,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:3456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -2387,7 +2390,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing-one-forbidden-cqdeps.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing-one-forbidden-cqdeps.json
index 4bdf06f..3949591 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing-one-forbidden-cqdeps.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing-one-forbidden-cqdeps.json
@@ -185,6 +185,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -881,6 +882,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -936,6 +938,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -969,7 +972,7 @@
     "name": "checkout pigweed.change data.changes.x:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -977,7 +980,7 @@
     "name": "checkout pigweed.change data.changes.x:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -985,7 +988,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:3456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -993,7 +996,7 @@
     "name": "checkout pigweed.change data.changes.forbidden:9999",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=9999, remote=None, ref=None, rebase=None, branch=None, gerrit_name='forbidden', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=9999, remote=None, ref=None, rebase=None, branch=None, gerrit_name='forbidden', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -2230,7 +2233,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied [Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False), Change(number=9999, remote=None, ref=None, rebase=None, branch=None, gerrit_name='forbidden', submitted=False, base=None, base_type=None, is_merge=False)]@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied [Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message=''), Change(number=9999, remote=None, ref=None, rebase=None, branch=None, gerrit_name='forbidden', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')]@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing.json
index 7a7091b..0327fe0 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple-one-missing.json
@@ -184,6 +184,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -246,6 +247,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -308,6 +310,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -533,7 +536,7 @@
     "name": "checkout pigweed.change data.changes.x:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -541,7 +544,7 @@
     "name": "checkout pigweed.change data.changes.x:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -549,7 +552,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:3456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1776,7 +1779,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied [Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)]@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied [Change(number=2345, remote='https://x.googlesource.com/not-a-submodule', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')]@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple.json
index aa88867..6427e84 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-multiple.json
@@ -183,6 +183,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -245,6 +246,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -307,6 +309,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -532,7 +535,7 @@
     "name": "checkout pigweed.change data.changes.x:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -540,7 +543,7 @@
     "name": "checkout pigweed.change data.changes.x:2345",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -548,7 +551,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:3456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -2041,7 +2044,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://x.googlesource.com/foo', ref='refs/changes/34/1234/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=2345, remote='https://x.googlesource.com/bar', ref='refs/changes/45/2345/1', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message=''), Change(number=3456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/3456/1', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try-not-found.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try-not-found.json
index a02530f..8814695 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try-not-found.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try-not-found.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.x:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/xyz', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/xyz', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
diff --git a/recipe_modules/checkout/tests/submodule.expected/submodule-try.json b/recipe_modules/checkout/tests/submodule.expected/submodule-try.json
index ffdee7b..6287599 100644
--- a/recipe_modules/checkout/tests/submodule.expected/submodule-try.json
+++ b/recipe_modules/checkout/tests/submodule.expected/submodule-try.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.x:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/baz', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://x.googlesource.com/baz', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1361,7 +1362,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://x.googlesource.com/baz', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://x.googlesource.com/baz', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='x', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/build.expected/basic.json b/recipes/build.expected/basic.json
index 7512261..97b42a7 100644
--- a/recipes/build.expected/basic.json
+++ b/recipes/build.expected/basic.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1095,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/build.expected/skip_archive.json b/recipes/build.expected/skip_archive.json
index 5bcbe0f..83577b7 100644
--- a/recipes/build.expected/skip_archive.json
+++ b/recipes/build.expected/skip_archive.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1095,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/docs_builder.expected/docs.json b/recipes/docs_builder.expected/docs.json
index ab7f156..53e3776 100644
--- a/recipes/docs_builder.expected/docs.json
+++ b/recipes/docs_builder.expected/docs.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/docs_builder.expected/docs_dry_run.json b/recipes/docs_builder.expected/docs_dry_run.json
index 749ed20..ac55065 100644
--- a/recipes/docs_builder.expected/docs_dry_run.json
+++ b/recipes/docs_builder.expected/docs_dry_run.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/envtest.expected/environment_variables.json b/recipes/envtest.expected/environment_variables.json
index 509bc37..b4d0d1c 100644
--- a/recipes/envtest.expected/environment_variables.json
+++ b/recipes/envtest.expected/environment_variables.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/envtest.expected/fail.json b/recipes/envtest.expected/fail.json
index d0c9fa0..d4570ce 100644
--- a/recipes/envtest.expected/fail.json
+++ b/recipes/envtest.expected/fail.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1095,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/envtest.expected/pigweed.json b/recipes/envtest.expected/pigweed.json
index 1b59ab0..e80e7f6 100644
--- a/recipes/envtest.expected/pigweed.json
+++ b/recipes/envtest.expected/pigweed.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1095,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/envtest.expected/windows.json b/recipes/envtest.expected/windows.json
index fb05e79..082e083 100644
--- a/recipes/envtest.expected/windows.json
+++ b/recipes/envtest.expected/windows.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1095,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/luci_config.expected/starlark.json b/recipes/luci_config.expected/starlark.json
index 512b9e5..185813d 100644
--- a/recipes/luci_config.expected/starlark.json
+++ b/recipes/luci_config.expected/starlark.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1359,7 +1360,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/pw_presubmit.expected/sign.json b/recipes/pw_presubmit.expected/sign.json
index 21502a4..a3fc185 100644
--- a/recipes/pw_presubmit.expected/sign.json
+++ b/recipes/pw_presubmit.expected/sign.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1095,7 +1095,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/pw_presubmit.expected/step.json b/recipes/pw_presubmit.expected/step.json
index c999cfb..a0e7461 100644
--- a/recipes/pw_presubmit.expected/step.json
+++ b/recipes/pw_presubmit.expected/step.json
@@ -181,8 +181,9 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"Build-Errors: continue\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
-      "@@@STEP_LOG_LINE@json.output@          {}@@@",
+      "@@@STEP_LOG_LINE@json.output@          null@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    }@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='Build-Errors: continue')@@@"
     ]
   },
   {
@@ -1359,7 +1360,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='Build-Errors: continue')]\nnot applied []@@@"
     ]
   },
   {
@@ -1575,6 +1576,7 @@
       "presubmit",
       "--output-directory",
       "[START_DIR]/co/p",
+      "--continue-after-build-error",
       "--full",
       "--step",
       "step1"
@@ -2061,6 +2063,7 @@
       "presubmit",
       "--output-directory",
       "[START_DIR]/co/p",
+      "--continue-after-build-error",
       "--full",
       "--step",
       "step2"
diff --git a/recipes/pw_presubmit.py b/recipes/pw_presubmit.py
index 3cfed7d..af23518 100644
--- a/recipes/pw_presubmit.py
+++ b/recipes/pw_presubmit.py
@@ -74,6 +74,10 @@
     with env():
         presubmit = api.pw_presubmit.init(root, props.pw_presubmit_options)
 
+        for change in checkout.changes:
+            if 'build-errors: continue' in change.commit_message.lower():
+                presubmit.options.continue_after_build_error = True
+
         with api.step.defer_results():
             for step in presubmit.steps:
                 api.pw_presubmit.run(ctx=presubmit, step=step, env=env)
@@ -257,6 +261,7 @@
             start_time=datetime.datetime.utcfromtimestamp(1600000000),
             execution_timeout=120,
         )
+        + api.checkout.cl_branch_parents(message='Build-Errors: continue')
         + api.step_data('upload.get build id', retcode=1)
         + ls_export('step1', 'foo')
         + api.time.seed(1600000000)
diff --git a/recipes/recipes.expected/cq_try.json b/recipes/recipes.expected/cq_try.json
index 1b39381..b45b40e 100644
--- a/recipes/recipes.expected/cq_try.json
+++ b/recipes/recipes.expected/cq_try.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1359,7 +1360,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/run_script.expected/run_script.json b/recipes/run_script.expected/run_script.json
index cce9ce5..d22f67e 100644
--- a/recipes/run_script.expected/run_script.json
+++ b/recipes/run_script.expected/run_script.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/target_to_cipd.expected/pw-presubmit.json b/recipes/target_to_cipd.expected/pw-presubmit.json
index ca65baf..95f0a40 100644
--- a/recipes/target_to_cipd.expected/pw-presubmit.json
+++ b/recipes/target_to_cipd.expected/pw-presubmit.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/target_to_cipd.expected/success.json b/recipes/target_to_cipd.expected/success.json
index 183f738..24eb055 100644
--- a/recipes/target_to_cipd.expected/success.json
+++ b/recipes/target_to_cipd.expected/success.json
@@ -195,7 +195,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -848,7 +848,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/manifest', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/tokendb_check.expected/addition.json b/recipes/tokendb_check.expected/addition.json
index 052aaf3..0762fc3 100644
--- a/recipes/tokendb_check.expected/addition.json
+++ b/recipes/tokendb_check.expected/addition.json
@@ -306,6 +306,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -531,7 +532,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1484,7 +1485,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/tokendb_check.expected/no-change.json b/recipes/tokendb_check.expected/no-change.json
index 33ae8a4..b9a9c49 100644
--- a/recipes/tokendb_check.expected/no-change.json
+++ b/recipes/tokendb_check.expected/no-change.json
@@ -306,6 +306,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -531,7 +532,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1484,7 +1485,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/tokendb_check.expected/removal.json b/recipes/tokendb_check.expected/removal.json
index abebfea..d2f3bde 100644
--- a/recipes/tokendb_check.expected/removal.json
+++ b/recipes/tokendb_check.expected/removal.json
@@ -306,6 +306,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -531,7 +532,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1484,7 +1485,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/tokendb_check.expected/update.json b/recipes/tokendb_check.expected/update.json
index a84099f..c989030 100644
--- a/recipes/tokendb_check.expected/update.json
+++ b/recipes/tokendb_check.expected/update.json
@@ -306,6 +306,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -531,7 +532,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1484,7 +1485,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/tokendb_updater.expected/dry-run.json b/recipes/tokendb_updater.expected/dry-run.json
index 7619bbc..c47379f 100644
--- a/recipes/tokendb_updater.expected/dry-run.json
+++ b/recipes/tokendb_updater.expected/dry-run.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/tokendb_updater.expected/separate-repo.json b/recipes/tokendb_updater.expected/separate-repo.json
index b0ce47b..ba47cc5 100644
--- a/recipes/tokendb_updater.expected/separate-repo.json
+++ b/recipes/tokendb_updater.expected/separate-repo.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/tokendb_updater.expected/simple.json b/recipes/tokendb_updater.expected/simple.json
index f82858b..fc20ccc 100644
--- a/recipes/tokendb_updater.expected/simple.json
+++ b/recipes/tokendb_updater.expected/simple.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/txt_roller.expected/backwards.json b/recipes/txt_roller.expected/backwards.json
index 9370846..aba69f1 100644
--- a/recipes/txt_roller.expected/backwards.json
+++ b/recipes/txt_roller.expected/backwards.json
@@ -640,7 +640,7 @@
     "name": "checkout foo.change data.changes.foo:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1093,7 +1093,7 @@
     "name": "checkout foo.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/txt_roller.expected/no-trigger.json b/recipes/txt_roller.expected/no-trigger.json
index a362413..13b357b 100644
--- a/recipes/txt_roller.expected/no-trigger.json
+++ b/recipes/txt_roller.expected/no-trigger.json
@@ -640,7 +640,7 @@
     "name": "checkout foo.change data.changes.foo:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1093,7 +1093,7 @@
     "name": "checkout foo.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://foo.googlesource.com/foo', ref='h3ll0', rebase=False, branch='main', gerrit_name='foo', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/txt_roller.expected/success.json b/recipes/txt_roller.expected/success.json
index 3c1265e..a366275 100644
--- a/recipes/txt_roller.expected/success.json
+++ b/recipes/txt_roller.expected/success.json
@@ -1015,7 +1015,7 @@
     "name": "checkout foo.change data.changes.foo:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://foo.googlesource.com/foo', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='foo', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://foo.googlesource.com/foo', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='foo', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1792,7 +1792,7 @@
     "name": "checkout foo.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://foo.googlesource.com/foo', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='foo', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://foo.googlesource.com/foo', ref='2d72510e447ab60a9728aeea2362d8be2cbd7789', rebase=False, branch='main', gerrit_name='foo', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/update_python_versions.expected/simple.json b/recipes/update_python_versions.expected/simple.json
index 04cba0e..de653b0 100644
--- a/recipes/update_python_versions.expected/simple.json
+++ b/recipes/update_python_versions.expected/simple.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/xrefs.expected/dry_run.json b/recipes/xrefs.expected/dry_run.json
index aedb3b8..c268ecc 100644
--- a/recipes/xrefs.expected/dry_run.json
+++ b/recipes/xrefs.expected/dry_run.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/xrefs.expected/kythe.json b/recipes/xrefs.expected/kythe.json
index 229c647..d2fc8a3 100644
--- a/recipes/xrefs.expected/kythe.json
+++ b/recipes/xrefs.expected/kythe.json
@@ -156,7 +156,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:1234",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -684,7 +684,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=1234, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='h3ll0', rebase=False, branch='main', gerrit_name='pigweed', submitted=True, base='HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_HEAD_', base_type='submitted_commit_hash', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {
diff --git a/recipes/xrefs.expected/tryjob.json b/recipes/xrefs.expected/tryjob.json
index b8d906a..7c32189 100644
--- a/recipes/xrefs.expected/tryjob.json
+++ b/recipes/xrefs.expected/tryjob.json
@@ -181,6 +181,7 @@
       "@@@STEP_LOG_LINE@json.output@  \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"ffffffffffffffffffffffffffffffffffffffff\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"commit\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"message\": \"\", @@@",
       "@@@STEP_LOG_LINE@json.output@        \"parents\": [@@@",
       "@@@STEP_LOG_LINE@json.output@          {}@@@",
       "@@@STEP_LOG_LINE@json.output@        ]@@@",
@@ -406,7 +407,7 @@
     "name": "checkout pigweed.change data.changes.pigweed:123456",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@3@@@",
-      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False)@@@"
+      "@@@STEP_SUMMARY_TEXT@Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base=None, base_type=None, is_merge=False, commit_message='')@@@"
     ]
   },
   {
@@ -1359,7 +1360,7 @@
     "name": "checkout pigweed.status",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False)]\nnot applied []@@@"
+      "@@@STEP_SUMMARY_TEXT@applied [Change(number=123456, remote='https://pigweed.googlesource.com/pigweed/pigweed', ref='refs/changes/56/123456/7', rebase=True, branch='main', gerrit_name='pigweed', submitted=False, base='REMOTE_BRANCH_REMOTE_BRANCH_REMOTE_BRANCH_', base_type='remote_branch_tip', is_merge=False, commit_message='')]\nnot applied []@@@"
     ]
   },
   {