$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-fields-conv.git /var/lib/mock/f42-build-865979-173613/root/chroot_tmpdir/scmroot/ocaml-ppx-fields-conv
Cloning into '/var/lib/mock/f42-build-865979-173613/root/chroot_tmpdir/scmroot/ocaml-ppx-fields-conv'...
$ git fetch origin e80eca00129a8031aa971549dc4075af3c564985:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-fields-conv
 * [new ref]         e80eca00129a8031aa971549dc4075af3c564985 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e80eca0 OCaml 5.3.0 rebuild for Fedora 42