$ git clone -n https://src.fedoraproject.org/rpms/gerbv.git /var/lib/mock/f45-build-9765-408/root/chroot_tmpdir/scmroot/gerbv
Cloning into '/var/lib/mock/f45-build-9765-408/root/chroot_tmpdir/scmroot/gerbv'...
$ git fetch origin 5b9c255ef9ad66256a518c81151c862c6f4d3ea1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gerbv
 * [new ref]         5b9c255ef9ad66256a518c81151c862c6f4d3ea1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b9c255 remove unused patch