$ git clone -n https://src.fedoraproject.org/rpms/ocaml-xml-light.git /var/lib/mock/f43-build-side-114891-61012261-6587670/root/chroot_tmpdir/scmroot/ocaml-xml-light
Cloning into '/var/lib/mock/f43-build-side-114891-61012261-6587670/root/chroot_tmpdir/scmroot/ocaml-xml-light'...
$ git fetch origin 057bed2dc9552c0155d43db904cda54f4f42104e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-xml-light
 * [new ref]         057bed2dc9552c0155d43db904cda54f4f42104e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 057bed2 Rebuild to fix OCaml dependencies