add origin

Author: Joe-Downs

.github/workflows/git-commit-checks.py

@@ -294,13 +294,15 @@ def _is_entirely_submodule_updates(repo, commit):
 #----------------------------------------------------------------------------
 
 def check_all_commits(config, repo):
-    # Get a list of commits that we'll be examining.  Use the programmatic form
+    # Get a list of commits that we'll be examining. Use the programmatic form
     # of "git log GITHUB_BASE_REF..GITHUB_HEAD_REF" (i.e., "git log
     # ^GITHUB_BASE_REF GITHUB_HEAD_REF") to do the heavy lifting to find that
-    # set of commits.
+    # set of commits. Because we're using pull_request_target, GITHUB_BASE_REF
+    # is already checked out. GITHUB_HEAD_REF has never been checked out, so we
+    # specify "origin/{GITHUB_HEAD_REF}".
     git_cli = git.cmd.Git(GITHUB_WORKSPACE)
     hashes = git_cli.log(f"--pretty=format:%h",
-                         f"{GITHUB_BASE_REF}..{GITHUB_HEAD_REF}").splitlines()
+                         f"{GITHUB_BASE_REF}..origin/{GITHUB_HEAD_REF}").splitlines()
 
     #------------------------------------------------------------------------