$ git clone -n https://src.fedoraproject.org/rpms/glusterfs.git /var/lib/mock/f42-build-867440-175505/root/chroot_tmpdir/scmroot/glusterfs
Cloning into '/var/lib/mock/f42-build-867440-175505/root/chroot_tmpdir/scmroot/glusterfs'...
$ git fetch origin c1384a450ce334202b2b373fefd53afdc8373d3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glusterfs
 * [new ref]         c1384a450ce334202b2b373fefd53afdc8373d3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1384a4 Rebuilt for the bin-sbin merge (2nd attempt)