My usual workflow when working with git, is something like this:
Fast forward three years (see what I did there :-) ), I tried to pull an untracked branch using Git Bash and received
If you wish to set tracking information for this branch you can do so with:
git branch --set-upstream-to=origin/ develop
The following achieved what I needed:
$ git branch --set-upstream-to=origin/develop develop
Branch 'develop' set up to track remote branch 'develop' from 'origin'.