[BUG] Backport workflow seems to have broken backports

[dbwiddis]

What is the bug?

After updating to VachaShah/[email protected], backport workflows are failing.

How can one reproduce the bug?

Merge a PR. Observe the backport workflow fail.

See: https://github.com/opensearch-project/opensearch-sdk-java/actions/workflows/backport.yml

What is the expected behavior?

Backport workflow completes.

What is your host/environment?

GitHub Actions.

Do you have any screenshots?

Run VachaShah/[email protected]
with:
github_token: ***
head_template: backport/backport-<%= number %>-to-<%= base %>
body_template: Backport <%= mergeCommitSha %> from #<%= number %>.
label_pattern: ^backport (?([^ ]+))$
labels_template: []
title_template: [Backport <%= base %>] <%= title %>
Warning: Your repository allows merge commits and rebase merging.
However, Backport only supports rebased and merged pull requests with a single commit and squashed and merged pull requests.
Consider only allowing squash merging.
See https://help.github.com/en/github/administering-a-repository/about-merge-methods-on-github for more information.
Backporting 97d51f426fff22a45faf7e5f from #653.
/usr/bin/git show -s --format='%an' 97d51f4b176745defe9f11526fff22a45faf7e5f
fatal: not a git repository (or any of the parent directories): .git
Error: Error: The process '/usr/bin/git' failed with exit code 128

Do you have any additional context?

Mostly posting this for situational awareness. I assume 2.2.0 has a bug and we should either revert to 2.1.0, or wait for 2.3.0, and in the meantime we should be alert when we merge PRs to manually backport them.

CC: @VachaShah

[VachaShah]

Hi @dbwiddis, I am working on fixing this issue. In the meantime, can you please revert to 2.1.0? Thank you!

[owaiskazi19]

@dbwiddis #661