Switch to another branch without changing the workspace files

Question

I cloned a git repository from GitHub, made some changes and some commits; I made quite a lot and all are quite dirty, so they\'re not suitable for a pull request. Now I created

Answer 1

git fetch && git checkout branch_name( "branch_name" here is the name of the branch )

Then you will see message, Switched to a new branch 'branch_name' Branch 'branch_name' set up to track remote branch 'branch_name' from 'origin'.