$ git clone -n https://src.fedoraproject.org/rpms/ocaml-compiler-libs-janestreet.git /var/lib/mock/f40-build-2013361-45873/root/chroot_tmpdir/scmroot/ocaml-compiler-libs-janestreet
Cloning into '/var/lib/mock/f40-build-2013361-45873/root/chroot_tmpdir/scmroot/ocaml-compiler-libs-janestreet'...
$ git fetch origin 456eeb1d9a3a8c6e242b3e198362388dd5f594b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-compiler-libs-janestreet
 * [new ref]         456eeb1d9a3a8c6e242b3e198362388dd5f594b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 456eeb1 OCaml 5.1.1 rebuild for Fedora 40