$ git clone -n https://src.fedoraproject.org/rpms/ocaml-luv.git /var/lib/mock/f42-build-865962-173613/root/chroot_tmpdir/scmroot/ocaml-luv
Cloning into '/var/lib/mock/f42-build-865962-173613/root/chroot_tmpdir/scmroot/ocaml-luv'...
$ git fetch origin cba2a202221d93987ba011d0d97c2bb05c3a1341:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-luv
 * [new ref]         cba2a202221d93987ba011d0d97c2bb05c3a1341 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cba2a20 OCaml 5.3.0 rebuild for Fedora 42