$ git clone -n https://src.fedoraproject.org/rpms/atril.git /var/lib/mock/f42-build-side-1-3585350-46904/root/chroot_tmpdir/scmroot/atril
Cloning into '/var/lib/mock/f42-build-side-1-3585350-46904/root/chroot_tmpdir/scmroot/atril'...
$ git fetch origin 723479cf85afd2a2bef8db6d05c538a84f1e0cbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/atril
 * [new ref]         723479cf85afd2a2bef8db6d05c538a84f1e0cbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 723479c update to 1.28.1