git checkout --orphan newBranch
git add -A  # Add all files and commit them
git commit -am "newBranch"
git branch -D master  # Deletes the master branch
git branch -m master  # Rename the current branch to master
git gc --aggressive --prune=all     # remove the old files
git push -f origin master  # Force push master branch to github
git gc --aggressive --prune=all     # remove the old files
git gc --auto