$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-deriving.git /var/lib/mock/f42-build-865907-173583/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving
Cloning into '/var/lib/mock/f42-build-865907-173583/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving'...
$ git fetch origin 0420e4f56ef3466da419e1b21cc90ac4eb12cd86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-deriving
 * [new ref]         0420e4f56ef3466da419e1b21cc90ac4eb12cd86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0420e4f OCaml 5.3.0 rebuild for Fedora 42