$ git clone -n https://src.fedoraproject.org/rpms/elixir.git /var/lib/mock/f40-build-2226318-52918/root/chroot_tmpdir/scmroot/elixir
Cloning into '/var/lib/mock/f40-build-2226318-52918/root/chroot_tmpdir/scmroot/elixir'...
$ git fetch origin 6269ca0ac775c7a9445f75d360671b67b14f276b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elixir
 * [new ref]         6269ca0ac775c7a9445f75d360671b67b14f276b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6269ca0 Update to upstream 1.16.0