$ git clone -n https://src.fedoraproject.org/rpms/mame.git /var/lib/mock/f41-build-1198288-22368/root/chroot_tmpdir/scmroot/mame
Cloning into '/var/lib/mock/f41-build-1198288-22368/root/chroot_tmpdir/scmroot/mame'...
$ git fetch origin 5bcd7261fe699659a1e6282b0d57ae7d5de7b1ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mame
 * [new ref]         5bcd7261fe699659a1e6282b0d57ae7d5de7b1ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bcd726 Update to 0.266