[rvdginste]

Personally, with git, I would work on one "work" branch with the 5 orthogonal commits in succession. For each commit that is finished, I would create a new branch and cherry-pick that specific commit on it. I would create a PR for those branches.

Once the PR (possibly with some changes still) is approved and merged, I would rebase my "work" branch on top of the updated master. Since it was an orthogonal commit, you'll typically see that the merged work just disappears from your branch during the rebase. If it really was orthogonal work, you'll not have any conflicts.

This is an approach I've used whenever I need to work on something that depends on other work that was not merged yet. You have a work branch that includes all the work, since you depend on it, but you want to offer smaller pieces as PR to make the review process more efficient.