$ git clone -n https://src.fedoraproject.org/rpms/cleanfeed.git /var/lib/mock/f41-build-1290475-23344/root/chroot_tmpdir/scmroot/cleanfeed
Cloning into '/var/lib/mock/f41-build-1290475-23344/root/chroot_tmpdir/scmroot/cleanfeed'...
$ git fetch origin fa3dc9c13c53fe4ffad61f04e19d27dd0bfd6eac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cleanfeed
 * [new ref]         fa3dc9c13c53fe4ffad61f04e19d27dd0bfd6eac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa3dc9c Eliminate use of obsolete %patchN syntax (#2283636)