src refspec master does not match any git code example

Example 1: error: src refspec master does not match any. git

# You are trying to add an empty repository, add something first, like a readme
touch README.md
git add README.md
git commit -m "Initial commit"
git push --set-upstream origin master

Example 2: error: src refspec master does not match any.

git config --global user.email "[email protected]"

git config --global user.name "Your Name"

Example 3: error: src refspec master does not match any.

git init
git add . //to add everything
git commit -m ''
git remote -v
git push heroku master