Add comment about FETCH_HEAD

codearchiver/modules/git.py

@@ -58,6 +58,7 @@ class Git(codearchiver.core.Module):
 						_logger.error(f'Failed to update-ref refs/codearchiver/{branch} to {commit}')
 				else:
 					_logger.error(f'Failed to fetch {commit}')
+			# This leaves over a FETCH_HEAD file, but git-bundle does not care about that, so it can safely be ignored.
 
 		_logger.info(f'Collecting repository metadata for index')
 		_, refs, _ = codearchiver.subprocess.run_with_log(['git', 'show-ref'], cwd = directory)