$ git clone -n https://src.fedoraproject.org/rpms/gimp-separate+.git /var/lib/mock/f41-build-745373-13348/root/chroot_tmpdir/scmroot/gimp-separate+
Cloning into '/var/lib/mock/f41-build-745373-13348/root/chroot_tmpdir/scmroot/gimp-separate+'...
$ git fetch origin d591392635eb11107bf2214c8c1c2d48a3a87481:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gimp-separate+
 * [new ref]         d591392635eb11107bf2214c8c1c2d48a3a87481 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d591392 Eliminate use of obsolete %patchN syntax (#2283636)