$ git clone -n https://src.fedoraproject.org/rpms/golang-github-emersion-message.git /var/lib/mock/f38-build-side-42-init-devel-1004825-29372/root/chroot_tmpdir/scmroot/golang-github-emersion-message
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1004825-29372/root/chroot_tmpdir/scmroot/golang-github-emersion-message'...
$ git fetch origin a9fa2cb86b07c9a0f81157ae4cd5532ef2546f2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-emersion-message
 * [new ref]         a9fa2cb86b07c9a0f81157ae4cd5532ef2546f2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9fa2cb Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild