$ git clone -n https://src.fedoraproject.org/rpms/uucp.git /var/lib/mock/f42-build-3465772-45743/root/chroot_tmpdir/scmroot/uucp
Cloning into '/var/lib/mock/f42-build-3465772-45743/root/chroot_tmpdir/scmroot/uucp'...
$ git fetch origin cd3dc6d0620d289f76483ac55482b9bac107132c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/uucp
 * [new ref]         cd3dc6d0620d289f76483ac55482b9bac107132c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd3dc6d Add sysusers.d config file to allow rpm to create users/groups automatically