gistfile1.yml

- hosts: all
  user: ubuntu
  sudo: True
  tasks:
  - name: checkout git repo (as bob)
    task: git repo=foo dest=/home/bob/foo
    user: bob
    notify: 
    - restart-foo
  handlers:
  - name: restart-foo (as root, the default)
    action: service name=foo state=restarted