$ git clone -n https://src.fedoraproject.org/rpms/ucviewer.git /var/lib/mock/f41-build-1042171-18998/root/chroot_tmpdir/scmroot/ucviewer
Cloning into '/var/lib/mock/f41-build-1042171-18998/root/chroot_tmpdir/scmroot/ucviewer'...
$ git fetch origin 775eae47aa3baa8b8044d9e20e09ca0e269348cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ucviewer
 * [new ref]         775eae47aa3baa8b8044d9e20e09ca0e269348cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 775eae4 Eliminate use of obsolete %patchN syntax (#2283636)