I rely on code review tools that can show me the difference between two patch sets. I really love Phabricator for that ability - push a set of commits and each gets a review. Absorb any fixes, push and suddenly each commit has a new version that you can diff against old ones if you care. It makes reviewing the patch set in totality trickier. However, since I’m practice you want individual commits within a set to be standalone ones, I’ve rarely missed the ability.