$ git clone -n https://src.fedoraproject.org/rpms/ocaml-rresult.git /var/lib/mock/f40-build-739716-109214/root/chroot_tmpdir/scmroot/ocaml-rresult
Cloning into '/var/lib/mock/f40-build-739716-109214/root/chroot_tmpdir/scmroot/ocaml-rresult'...
$ git fetch origin dcd6bb9ee7bb40e57d199980a45660b2aa6d6c77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-rresult
 * [new ref]         dcd6bb9ee7bb40e57d199980a45660b2aa6d6c77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dcd6bb9 OCaml 5.1 rebuild for Fedora 40