$ git clone -n https://src.fedoraproject.org/rpms/erlang-erlware_commons.git /var/lib/mock/f41-build-side-1-2811251-32927/root/chroot_tmpdir/scmroot/erlang-erlware_commons
Cloning into '/var/lib/mock/f41-build-side-1-2811251-32927/root/chroot_tmpdir/scmroot/erlang-erlware_commons'...
$ git fetch origin 3a7325ffe080c3e619cd75f484c83cafb837ac0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-erlware_commons
 * [new ref]         3a7325ffe080c3e619cd75f484c83cafb837ac0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a7325f Cosmetic changes