https://help.github.com/en/articles/checking-out-pull-requests-locally
https://github.com/betaflight/betaflight/pull/8112/
git fetch origin pull/ID/head:BRANCHNAMEgit fetch origin pull/8112/head:temp
Checking out pull requests locally
原文：https://www.cnblogs.com/chucklu/p/10861736.html