$ git clone -n https://src.fedoraproject.org/rpms/ocaml-xml-light.git /var/lib/mock/f45-build-20772-573/root/chroot_tmpdir/scmroot/ocaml-xml-light
Cloning into '/var/lib/mock/f45-build-20772-573/root/chroot_tmpdir/scmroot/ocaml-xml-light'...
$ git fetch origin 6bb0e15e7e4dcf7fa00880385c4812573712c95d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-xml-light
 * [new ref]         6bb0e15e7e4dcf7fa00880385c4812573712c95d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6bb0e15 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild