$ git clone -n https://src.fedoraproject.org/rpms/mame.git /var/lib/mock/f38-build-side-42-init-devel-1143805-30457/root/chroot_tmpdir/scmroot/mame
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1143805-30457/root/chroot_tmpdir/scmroot/mame'...
$ git fetch origin a1a2721424f56cd95de68e344c679e97a0a9e51f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mame
 * [new ref]         a1a2721424f56cd95de68e344c679e97a0a9e51f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1a2721 Update to 0.257 and switch to Qt 6 on Fedora 38+