I will be refactoring and reorganising QuTiP’s internal data structures, a large task that was previously attempted by someone else but one that never quite got completed and lives in a disused branch on their fork. In the intervening year or so, the codebase has moved on significantly, so GitHub now sounds the death knell

This branch is 85 commits ahead, 366 commits behind qutip:master.

I want to know what changes they had made, without being inundated by unrelated changes on the master branch.

Let’s assume that the old branch of interest is called old-feature and lives in a forked repository which I have added as a remote called fork.