Checkout branch on different remote

Question

I have a repo that has another remote upstream besides origin. I can do git checkout origin/master, but when I run git checkout upst

Answer 1

In more concise way (I'm using git 2.28), you can say

git fetch upstream

and then

git checkout -b  --guess

where the --guess flag checks if a branch corresponding to exists on any of the remotes and tracks the corresponding remote (docs here).