Status command cannot cope with detached head

[bittrance]

The status command today depends on libgit2 get_repository_head in order to find the current branch name. However, it does not support detached head (there is a get_repository_head_detached for that but a detached head does not point to a branch so this does not help) and errors with "reference 'HEAD' is neither a local nor a remote branch." Unfortunately, the GitHub checkout action intentionally creates a detached head when checking out for a pull request, meaning that we cannot find the branch name by simply looking at HEAD.

There is a work-around described here actions/checkout#124 (comment) which probably works (doing git checkout ${{ github.head_ref }} between checkout action and gitops-promotion status action seems to resolve the issue. However, I'm thinking the correct fix for this is to require the caller to provide the branch name when calling status. Opinions?