$ git clone -n https://src.fedoraproject.org/rpms/gimp-separate+.git /var/lib/mock/f41-build-side-1-2951929-35499/root/chroot_tmpdir/scmroot/gimp-separate+
Cloning into '/var/lib/mock/f41-build-side-1-2951929-35499/root/chroot_tmpdir/scmroot/gimp-separate+'...
$ git fetch origin 77cb1bca8f8e67924066c39d071f534928cf13e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gimp-separate+
 * [new ref]         77cb1bca8f8e67924066c39d071f534928cf13e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77cb1bc Upstream is inactive and addon is obsolete