$ git clone -n https://src.fedoraproject.org/rpms/erlang-jose.git /var/lib/mock/f40-build-2708649-71515/root/chroot_tmpdir/scmroot/erlang-jose
Cloning into '/var/lib/mock/f40-build-2708649-71515/root/chroot_tmpdir/scmroot/erlang-jose'...
$ git fetch origin 8caa5382c0d3f460ca50ee8ba5f2743dd409a6d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-jose
 * [new ref]         8caa5382c0d3f460ca50ee8ba5f2743dd409a6d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8caa538 Retired: Long term failure to build