Error: Critical error. This error possibly occurred because the permissions of the workflow are set incorrectly. You can see the correct setting of permissions here: https://github.com/py-cov-action/python-coverage-comment-action#basic-usage
Otherwise please look for open issues or open one in https://github.com/py-cov-action/python-coverage-comment-action/
Traceback (most recent call last):
  File "/workdir/coverage_comment/subprocess.py", line 22, in run
    return subprocess.run(
           ^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '('git', 'diff', '--unified=0', 'FETCH_HEAD...HEAD')' returned non-zero exit status 128.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/workdir/coverage_comment/subprocess.py", line 65, in _git
    return run(
           ^^^^
  File "/workdir/coverage_comment/subprocess.py", line 36, in run
    raise SubProcessError("\n".join([exc.stderr, exc.stdout])) from exc
coverage_comment.subprocess.SubProcessError: fatal: FETCH_HEAD...HEAD: no merge base



The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/workdir/coverage_comment/main.py", line 46, in main
    exit_code = action(
                ^^^^^^^
  File "/workdir/coverage_comment/main.py", line 98, in action
    return process_pr(
           ^^^^^^^^^^^
  File "/workdir/coverage_comment/main.py", line 135, in process_pr
    added_lines = coverage_module.get_added_lines(git=git, base_ref=base_ref)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workdir/coverage_comment/coverage.py", line 296, in get_added_lines
    diff = git.diff("--unified=0", "FETCH_HEAD...HEAD")
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workdir/coverage_comment/subprocess.py", line 73, in _git
    raise GitError from exc
coverage_comment.subprocess.GitError