$ git clone -n https://src.fedoraproject.org/rpms/mame.git /var/lib/mock/f40-build-761691-121637/root/chroot_tmpdir/scmroot/mame
Cloning into '/var/lib/mock/f40-build-761691-121637/root/chroot_tmpdir/scmroot/mame'...
$ git fetch origin ed957fa7bef509ada6fe60c44a601475d7348437:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mame
 * [new ref]         ed957fa7bef509ada6fe60c44a601475d7348437 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed957fa Update to 0.261 and go back to ld.bfd for rawhide