Mercurial has solved this quite elegantly. The Evolve extension is basically standard functionality and all changesets (commits) have a state: secret, draft, pu

Mercurial has solved this quite elegantly. The Evolve extension is basically standard functionality and all changesets (commits) have a state: secret, draft, public. You can share the changesets and you can "prune" them, which basically tells the world that if they have a changeset with that hash to delete it.