I have a shell script that is run as part of a GitHub Actions workflow that, on occasion, clones a repository, creates, commits to, and pushes a branch, and then creates (or at least tries to) a pull request for the branch using gh pr create. However, gh is failing with "aborted: you must first push the current branch to a remote, or use the --head flag" despite the fact that the command immediately before it is "git push -u origin "$branch_name" (tried with & without the -u option).

• The repository is public.
• The remote URL used to check out the repository is of the form https://x-access-token:$GITHUB_TOKEN@github.com/$OWNER/$REPO, where the same token is also set as the $GITHUB_TOKEN environment variable.
• The command succeeds if the --head option is used.