$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-z.git /var/lib/mock/f42-build-3355589-45025/root/chroot_tmpdir/scmroot/golang-modernc-z
Cloning into '/var/lib/mock/f42-build-3355589-45025/root/chroot_tmpdir/scmroot/golang-modernc-z'...
$ git fetch origin d5641f250f7378bb0bf93e180aa1cfc00c72b6f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-z
 * [new ref]         d5641f250f7378bb0bf93e180aa1cfc00c72b6f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d5641f2 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild