The first test case that I create

$ mkdir ~/Hello-World

$ cd ~/Hello-World

$ git init

Initialized empty Git repository in /Users/you/Hello-World/ .git/

$ touch README

$ git add README

$ git commit -m 'first commit'

$ git remote add origin https://github.com/username/Hello-World.git

$ git push origin master