How can I download the changes contained in a Github pull request as a unified diff?
Simone Carletti
To view a commit as a diff/patch file, just add .diff or .patch to the end of the URL, for example:
Somewhat related, to let git download pull request 123 and patch it into mylocalbranch locally, run:
git checkout -b mylocalbranch
git pull origin pull/921/head
To get the PR changes into your local repo in an staged but uncommitted state, so you can review:
git pull origin pull/123/head --no-commit
And to generate a patch file from that:
git diff --cached > pr123.diff
来源：https://stackoverflow.com/questions/6188591/download-github-pull-request-as-unified-diff