At this time in the CI, merge is not accessible from tree https://github.community/t/github-sha-but-how-to-get-the-latest-commit-reference-on-a-branch/17160
At this time in the CI, merge is not accessible from tree https://github.community/t/github-sha-but-how-to-get-the-latest-commit-reference-on-a-branch/17160