$ git clone -n https://src.fedoraproject.org/rpms/allegro.git /var/lib/mock/f40-build-762442-122044/root/chroot_tmpdir/scmroot/allegro
Cloning into '/var/lib/mock/f40-build-762442-122044/root/chroot_tmpdir/scmroot/allegro'...
$ git fetch origin 74d01b5b28ba9730d3f88123b64d4e62638135b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/allegro
 * [new ref]         74d01b5b28ba9730d3f88123b64d4e62638135b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74d01b5 Fix dat2c bug causing FTBFS of allegro using packages (rhbz#2225996)