$ git clone -n https://src.fedoraproject.org/rpms/erlang-riak_dt.git /var/lib/mock/f45-build-8438-389/root/chroot_tmpdir/scmroot/erlang-riak_dt
Cloning into '/var/lib/mock/f45-build-8438-389/root/chroot_tmpdir/scmroot/erlang-riak_dt'...
$ git fetch origin 4458217c723d26d9d250703199c01ac1b741d884:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-riak_dt
 * [new ref]         4458217c723d26d9d250703199c01ac1b741d884 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4458217 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild