$ git clone -n https://src.fedoraproject.org/rpms/ocaml-sexplib.git /var/lib/mock/f40-build-739575-109112/root/chroot_tmpdir/scmroot/ocaml-sexplib
Cloning into '/var/lib/mock/f40-build-739575-109112/root/chroot_tmpdir/scmroot/ocaml-sexplib'...
$ git fetch origin 6919c277542ef44ff1030dc96477b2485f5e8489:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-sexplib
 * [new ref]         6919c277542ef44ff1030dc96477b2485f5e8489 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6919c27 OCaml 5.1 rebuild for Fedora 40