要将提交文件视为diff/patch文件，只需在URL末尾添加.diff或.patch，例如:

https://github.com/weppos/whois/pull/90 https://github.com/weppos/whois/pull/90.diff https://github.com/weppos/whois/pull/90.patch

有点相关，让git下载拉请求123并在本地将其补丁到mylocalbranch，运行:

git checkout -b mylocalbranch
git pull origin pull/921/head

要将PR更改以阶段性但未提交的状态放入本地回购，您可以查看:

git pull origin pull/123/head --no-commit

然后生成一个补丁文件:

git diff --cached > pr123.diff    

对于相关的解决方案，还有另一种替代方案。它回答了最初的问题，并使用git fetch和FETCH_HEAD。

git fetch origin pull/921/head
cat .git/FETCH_HEAD
# Then either of
git diff `git merge-base FETCH_HEAD HEAD`..FETCH_HEAD > diff.diff # Downloads the unified diff as asked in the original question
git merge FETCH_HEAD # Applies the diff