http://williamdurand.fr/2012/01/17/my-git-branching-model/

i.e. before merging a feature branch, always rebase it on the tip of the integration branch, then merge it in with --no-ff to record an explicit merge commit on the integration branch, even though a fast-forward is possible. This gets you the temporal straightforwardness of rebase while preserving the fact that there WERE feature branches and their commits are partitioned in history.