Re: [PATCH] Additional merge-base tests

> It works[*] and it does what using the timestamp was trying to do. 
> Namely, work from "more recent" (or "closer") commits toward "older" (or 
> "farther") commits until you've gone past the point you care about.
> 
> It's a little late to be changing the structure of a commit and you'd 
> have to deal with some size/scale issues, but it's do-able. A better 
> idea may be to generate and keep the generation number on a per 
> repository basis, and you'd be able to work around changing grafts.