Compare old and new versions of force-pushed GitHub pull request

Question

Frequently, my colleagues will make some changes to an open pull request, rebase their local branch against the base branch - often squashing their changes into previous commits

Answer 1

I believe that this is simply not possible to obtain the old versions of pull requests as suggested by this ticket: https://github.com/isaacs/github/issues/999 Users who post in that repository are advised to contact GitHub support, so likely GitHub support has already replied that it was not possible when that ticket was created.

This is a major missing feature from GitHub pull requests that Gerrit has and which Gerrit users miss badly.