$ git clone -n https://src.fedoraproject.org/rpms/mame.git /var/lib/mock/f40-build-1534914-23927/root/chroot_tmpdir/scmroot/mame
Cloning into '/var/lib/mock/f40-build-1534914-23927/root/chroot_tmpdir/scmroot/mame'...
$ git fetch origin ebe98899047e37dcc8a99494881f5366ada76b32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mame
 * [new ref]         ebe98899047e37dcc8a99494881f5366ada76b32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebe9889 Update to 0.267