$ git clone -n https://src.fedoraproject.org/rpms/udns.git /var/lib/mock/f41-build-side-1-2671038-29078/root/chroot_tmpdir/scmroot/udns
Cloning into '/var/lib/mock/f41-build-side-1-2671038-29078/root/chroot_tmpdir/scmroot/udns'...
$ git fetch origin 13ad4cec01aa74fbb157edc09897194c938f357c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/udns
 * [new ref]         13ad4cec01aa74fbb157edc09897194c938f357c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13ad4ce bump to 0.6