Why do I need to do `--set-upstream` all the time?

Question

I create a new branch in Git:

git branch my_branch

Push it:

git push origin my_branch

Now say someone mad

Answer 1

I use this Git alias instead of copy/pasting the suggestion from Git every time: https://gist.github.com/ekilah/88a880c84a50b73bd306

Source copied below (add this to your ~/.gitconfig file):

[alias]
  pushup = "!gitbranchname() { git symbolic-ref --short HEAD; }; gitpushupstream() { git push --set-upstream origin `gitbranchname`; }; gitpushupstream"