$ git clone -n https://src.fedoraproject.org/rpms/mame.git /var/lib/mock/f38-build-side-42-init-devel-1099356-30073/root/chroot_tmpdir/scmroot/mame
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1099356-30073/root/chroot_tmpdir/scmroot/mame'...
$ git fetch origin 985013f2e6d15bc9d2924d8ef12dce309f3f4420:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mame
 * [new ref]         985013f2e6d15bc9d2924d8ef12dce309f3f4420 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 985013f Second attempt at fixing ppc64le validation failure