roll_util: Add link to repository being rolled

Add links to the repositories being rolled in the commit message. This
makes it easier to track down the commits themselves.

Change-Id: I848a411cc911e8c539d75e767061707ed79c0097
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/56321
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Rob Mohr <mohrr@google.com>
diff --git a/recipe_modules/roll_util/api.py b/recipe_modules/roll_util/api.py
index 6df915c..d2d3ee6 100644
--- a/recipe_modules/roll_util/api.py
+++ b/recipe_modules/roll_util/api.py
@@ -314,6 +314,7 @@
         template = """
 [roll {project_name}] {sanitized_message}
 
+{remote}
 {project_name} Rolled-Commits: {old_revision:.15}..{new_revision:.15}
         """.strip()
 
@@ -321,6 +322,7 @@
 
         kwargs = {
             'project_name': roll.project_name,
+            'remote': roll.remote,
             'original_message': commit.message,
             'sanitized_message': _sanitize_message(commit.message),
             'old_revision': roll.old_revision,
@@ -350,6 +352,7 @@
 
 {one_liners}
 
+{remote}
 {project_name} Rolled-Commits: {old_revision:.15}..{new_revision:.15}
     """.strip()
 
@@ -365,6 +368,7 @@
 
         kwargs = {
             'project_name': roll.project_name,
+            'remote': roll.remote,
             'num_commits': num_commits,
             'one_liners': '\n'.join(one_liners),
             'old_revision': roll.old_revision,