---

- name: Generate deployment SSH key if not available
  command: 'ssh-keygen -b 256 -t ed25519 -q -N "" -f "{{ item.key_file }}" -C "Ansible generated deployment key for {{ item.repo }}"'
  args:
    creates: '{{ item.key_file }}'
  when: deploy_git_keygen and item.key_file is defined

- name: Execute pre-commands
  command: '{{ item.pre_command.command }}'
  args:
    chdir: '{{ item.pre_command.chdir | default(item.dest) }}'
  when: item.pre_command is defined

- name: Checkout git repo
  git:
    repo: '{{ item.repo }}'
    dest: '{{ item.dest }}'
    force: 'yes'
    key_file: '{{ item.key_file | default(omit) }}'
    version: '{{ item.version | default("HEAD") }}'
  register: git_checkout

- name: Execute post-commands
  command: '{{ item.post_command.command }}'
  args:
    chdir: '{{ item.post_command.chdir | default(item.dest) }}'
  when: item.post_command is defined and git_checkout.changed

...