$ git clone -n https://src.fedoraproject.org/rpms/gegl04.git /var/lib/mock/f45-build-9712-408/root/chroot_tmpdir/scmroot/gegl04
Cloning into '/var/lib/mock/f45-build-9712-408/root/chroot_tmpdir/scmroot/gegl04'...
$ git fetch origin 23bc8aacca65798162800bf44e1196776287c175:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gegl04
 * [new ref]         23bc8aacca65798162800bf44e1196776287c175 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23bc8aa Fix overflow in parsing RGBE/HDR image files