$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-deriving.git /var/lib/mock/f39-build-1808418-41827/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving
Cloning into '/var/lib/mock/f39-build-1808418-41827/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving'...
$ git fetch origin 4aed1ec91971dc40cf0cf947ed4b38b56d2537d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-deriving
 * [new ref]         4aed1ec91971dc40cf0cf947ed4b38b56d2537d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4aed1ec Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild