GitHub – Easily fetch a remote pull request
A colleague needs some help with some code or you just want to check it out and play with it. Here is what you need to do:
git fetch origin pull/$PR_ID/head:$BRANCH_NAME
where $PR_ID is the pull request ID and $BRANCH_NAME is the name of the branch that you want to create. Then check out the branch:
git checkout $BRANCH_NAME
Read more on the GitHub documentation:
Run the code and make any changes! Happy coding!