$ git clone -n https://src.fedoraproject.org/rpms/player.git /var/lib/mock/f40-build-2365517-60375/root/chroot_tmpdir/scmroot/player
Cloning into '/var/lib/mock/f40-build-2365517-60375/root/chroot_tmpdir/scmroot/player'...
$ git fetch origin d59a35778203273d7ae5153a19a5fd35a79b1884:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/player
 * [new ref]         d59a35778203273d7ae5153a19a5fd35a79b1884 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d59a357 Update more occurences