error: src refspec master does not match any error: failed to push some refs to 'https://git.heroku.com/damp-taiga-76931.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: git push heroku master error: src refspec master does not match any error: failed to push some refs to 'https://git.heroku.com/write-any.git'

git push heroku HEAD:master