Clarify what type of reference we are trying to push. (#2279)

echo "release_branch=${branch_name}" >"${output_file}"

if [[ "${DRY_RUN}" == "true" ]]; then

    git push --force origin "HEAD:${branch_name}"

    git push --force origin "HEAD:refs/heads/${branch_name}"

else

    commit_sha=$(git rev-parse --short HEAD)

    if git ls-remote --exit-code --heads origin "${branch_name}"; then