My best attempt to integrate Travis CI to deploy /dist folder to Heroku

.travis.yml

#
#  Travis CI > Heroku
#  deploy /dist folder
#
#  author: Nick Kaye
#  laboratory: Outright Mental Inc.
#
#  NOTES:
#    Heroku & Compass CLI in Gemfile for Bundler
#    Bower & Grunt CLI in Package.json for Npm
#    Travis Cache Bundler & Npm
#
language: node_js
node_js:
  - '0.10'
install:
  - bundle install
  - bower install
cache:
  bundler: true
  directories:
    - node_modules
after_success:
  # Turn off warnings about SSH keys:
  - echo "Host heroku.com" >> ~/.ssh/config
  - echo "   StrictHostKeyChecking no" >> ~/.ssh/config
  - echo "   CheckHostIP no" >> ~/.ssh/config
  - echo "   UserKnownHostsFile=/dev/null" >> ~/.ssh/config
  # Clear your current Heroku SSH keys:
  - heroku keys:clear
  # Add a new SSH key to Heroku
  - yes | heroku keys:add
  # Clone Heroku deployment repo to dist folder
  - git clone [email protected]:qurrus-web-prod.git dist
  # Build
  - grunt build
  # Commit and Push dist folder to Heroku
  - cd dist
  - git config --global user.name "INSERT Your Name"
  - git config --global user.email "[email protected]"
  - git add *
  - git commit -am "Travis CI"
  - git push origin master
env:
  global:
    secure: <<< INSERT YOUR travis-encrypted HEROKU_API_KEY=abc-your-heroku-api-key-abc >>>

Clone Heroku deployment repo to dist folder

• git clone [email protected]:qurrus-web-prod.git dist
  fatal: destination path 'dist' already exists and is not an empty directory.

I can't get it. Cant see the whole process and logic. Need help!