$ git clone -n https://src.fedoraproject.org/rpms/ocaml-dune.git /var/lib/mock/f40-build-767882-125110/root/chroot_tmpdir/scmroot/ocaml-dune
Cloning into '/var/lib/mock/f40-build-767882-125110/root/chroot_tmpdir/scmroot/ocaml-dune'...
$ git fetch origin 594b95bea5d6cd51827e522c59eb5c93ea8e310a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-dune
 * [new ref]         594b95bea5d6cd51827e522c59eb5c93ea8e310a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 594b95b OCaml 5.1.1 + s390x code gen fix for Fedora 40