$ git clone -n https://src.fedoraproject.org/rpms/elixir.git /var/lib/mock/f40-build-2430021-60606/root/chroot_tmpdir/scmroot/elixir
Cloning into '/var/lib/mock/f40-build-2430021-60606/root/chroot_tmpdir/scmroot/elixir'...
$ git fetch origin 86cdfa098a194286a3cd92770bf6889d6032e152:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elixir
 * [new ref]         86cdfa098a194286a3cd92770bf6889d6032e152 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86cdfa0 Update to upstream 1.16.1