$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-stable-witness.git /var/lib/mock/f42-build-865761-173493/root/chroot_tmpdir/scmroot/ocaml-ppx-stable-witness
Cloning into '/var/lib/mock/f42-build-865761-173493/root/chroot_tmpdir/scmroot/ocaml-ppx-stable-witness'...
$ git fetch origin 139dbc859459314c21dce40132da32e8f4985477:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-stable-witness
 * [new ref]         139dbc859459314c21dce40132da32e8f4985477 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 139dbc8 OCaml 5.3.0 rebuild for Fedora 42