$ git clone -n https://src.fedoraproject.org/rpms/elixir.git /var/lib/mock/f41-build-749596-13378/root/chroot_tmpdir/scmroot/elixir
Cloning into '/var/lib/mock/f41-build-749596-13378/root/chroot_tmpdir/scmroot/elixir'...
$ git fetch origin b04f8563df70854409d931f46c4f055005772889:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/elixir
 * [new ref]         b04f8563df70854409d931f46c4f055005772889 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b04f856 Update to upstream 1.16.2