$ git clone -n https://src.fedoraproject.org/rpms/ocaml-rresult.git /var/lib/mock/f42-build-865638-173376/root/chroot_tmpdir/scmroot/ocaml-rresult
Cloning into '/var/lib/mock/f42-build-865638-173376/root/chroot_tmpdir/scmroot/ocaml-rresult'...
$ git fetch origin 9368190b1c703cff97a345200e1cb99a634b404a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-rresult
 * [new ref]         9368190b1c703cff97a345200e1cb99a634b404a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9368190 OCaml 5.3.0 rebuild for Fedora 42