$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-import.git /var/lib/mock/f38-build-side-42-init-devel-753065-27663/root/chroot_tmpdir/scmroot/ocaml-ppx-import
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-753065-27663/root/chroot_tmpdir/scmroot/ocaml-ppx-import'...
$ git fetch origin acccaaf68c405008b13663d4648654f77807c249:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-import
 * [new ref]         acccaaf68c405008b13663d4648654f77807c249 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at acccaaf Rebuild OCaml packages for F38