Download Github pull request as unified diff

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

To view a commit as a diff/patch file, just add .diff or .patch to the end of the URL, for example:

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