$ git clone -n https://src.fedoraproject.org/rpms/urg.git /var/lib/mock/f41-build-1164829-21591/root/chroot_tmpdir/scmroot/urg
Cloning into '/var/lib/mock/f41-build-1164829-21591/root/chroot_tmpdir/scmroot/urg'...
$ git fetch origin a87cb166118b15612c764213cbdca233d5861e77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/urg
 * [new ref]         a87cb166118b15612c764213cbdca233d5861e77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a87cb16 Eliminate use of obsolete %patchN syntax (#2283636)