$ git clone -n https://src.fedoraproject.org/rpms/zeal.git /var/lib/mock/f39-build-2451789-61041/root/chroot_tmpdir/scmroot/zeal
Cloning into '/var/lib/mock/f39-build-2451789-61041/root/chroot_tmpdir/scmroot/zeal'...
$ git fetch origin 3262b9c0df3f75d74994f955712bff7a83e34663:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zeal
 * [new ref]         3262b9c0df3f75d74994f955712bff7a83e34663 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3262b9c Merge branch 'f40' into f39