I create a new branch in Git:
git branch my_branch
Push it:
git push origin my_branch
Now say someone mad
You can use:
git config --global branch.autosetupmerge always
which will link the upstream branch each time you create or checkout a new branch.
See https://felipec.wordpress.com/2013/09/01/advanced-git-concepts-the-upstream-tracking-branch/
This also works with branch.autosetuprebase, if you follow a more rebase focused workflow, but don't use this unless you know what you're doing, as it will default your pull behavior to rebase, which can cause odd results.