Pass the C<--prune> and C<--prune-tags> flags to L<git-fetch(1)>
calls on incremental clones.
+=item --exit-code
+
+Exit with C<127> if no updates are done when relying on a manifest.
+Updates include fingerprint mismatches in the manifest, new symlinks,
+new repositories, and removed repositories from the L<--project-list>
+
=item -k
=item --keep-going