$ git clone -n https://src.fedoraproject.org/rpms/ocaml-xmlrpc-light.git /var/lib/mock/f38-build-side-42-init-devel-780867-27901/root/chroot_tmpdir/scmroot/ocaml-xmlrpc-light
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-780867-27901/root/chroot_tmpdir/scmroot/ocaml-xmlrpc-light'...
$ git fetch origin 278e66c0c769315fd3bff9fe5e1986ba9b7f2b6e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-xmlrpc-light
 * [new ref]         278e66c0c769315fd3bff9fe5e1986ba9b7f2b6e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 278e66c Rebuild OCaml packages for F38