$ git clone -n https://src.fedoraproject.org/rpms/ocaml-stdio.git /var/lib/mock/f42-build-865659-173376/root/chroot_tmpdir/scmroot/ocaml-stdio
Cloning into '/var/lib/mock/f42-build-865659-173376/root/chroot_tmpdir/scmroot/ocaml-stdio'...
$ git fetch origin 95a8f258fd02af76b656dcd44a1793abb8880e98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-stdio
 * [new ref]         95a8f258fd02af76b656dcd44a1793abb8880e98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 95a8f25 OCaml 5.3.0 rebuild for Fedora 42