$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-variants-conv.git /var/lib/mock/f45-build-20698-573/root/chroot_tmpdir/scmroot/ocaml-ppx-variants-conv
Cloning into '/var/lib/mock/f45-build-20698-573/root/chroot_tmpdir/scmroot/ocaml-ppx-variants-conv'...
$ git fetch origin 00cbe26b1471fc22f118f476c6b68e88a2847ef0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-variants-conv
 * [new ref]         00cbe26b1471fc22f118f476c6b68e88a2847ef0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00cbe26 OCaml 5.5.1 rebuild