$ git clone -n https://src.fedoraproject.org/rpms/ocaml-topkg.git /var/lib/mock/f40-build-739609-109128/root/chroot_tmpdir/scmroot/ocaml-topkg
Cloning into '/var/lib/mock/f40-build-739609-109128/root/chroot_tmpdir/scmroot/ocaml-topkg'...
$ git fetch origin 0150adb693d63876f3320bb056dc95b91941539a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-topkg
 * [new ref]         0150adb693d63876f3320bb056dc95b91941539a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0150adb OCaml 5.1 rebuild for Fedora 40