$ git clone -n https://src.fedoraproject.org/rpms/libart_lgpl.git /var/lib/mock/f41-build-1045109-19054/root/chroot_tmpdir/scmroot/libart_lgpl
Cloning into '/var/lib/mock/f41-build-1045109-19054/root/chroot_tmpdir/scmroot/libart_lgpl'...
$ git fetch origin 8e691a9f7e15454c9f9a4115c8e5ba2ebdbc272a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libart_lgpl
 * [new ref]         8e691a9f7e15454c9f9a4115c8e5ba2ebdbc272a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e691a9 Eliminate use of obsolete %patchN syntax (#2283636)