$ git clone -n https://src.fedoraproject.org/rpms/ocaml-graphics.git /var/lib/mock/f40-build-739734-109218/root/chroot_tmpdir/scmroot/ocaml-graphics
Cloning into '/var/lib/mock/f40-build-739734-109218/root/chroot_tmpdir/scmroot/ocaml-graphics'...
$ git fetch origin 14fea903bcdff04f0c78eb78747c2deaa23bed34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-graphics
 * [new ref]         14fea903bcdff04f0c78eb78747c2deaa23bed34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14fea90 OCaml 5.1 rebuild for Fedora 40