I'm using satis to curate several hosted Mercurial repos. One of the repos had a bookmark 'stable' which satis scanned and created an entry for in packages.json. I stripped the branch, removed the remote repo and repushed. Now when I run `satis build ...` it still makes an entry for stable which is pointing to a changeset that no longer exists. How can I make satis re-scan or build from scratch?