Unable to use alongside github merge queues

[GeorgePen93]

We recently implemented github merge queues and this action no longer works due to how github creates a new branch for the merge queue.

We have tried to get around this issue by parsing the commit hash from the new github branch e.g. if the new merge queue branch is called gh-readonly-queue/master/pr-2541-968707c39f80422b193c65cb50938119980604c5 we parse out the 968707c39f80422b193c65cb50938119980604c5 and pass this to path-filters.

This no longer causes an error but also does not work as intended as it now no longer will recognise changes in specific files when changes have been made to them in the commit that has been parsed from the branch name.

The only thing we have noticed is this error:

Searching for merge-base master...968707c39f80422b193c65cb50938119980604c5
  /usr/bin/git show-ref master
  /usr/bin/git cat-file -e 968707c39f80422b193c65cb50938119980604c5^{commit}
  fatal: Not a valid object name 968707c39f80[42](https://github.com/org/repo-name/actions/runs/11614801720/job/32343822442#step:6:44)2b193c65cb50938119980604c5^{commit}

However the subsequent git fetch does succeed.