Simiple skeleton to checkout/update git app project on remote webserver, run composer if necessary and set webserver file permissions.

deploy_git.yml

---
# file: deploy_git.yml
-
  hosts: "{{ hosts }}"
  user: root
  vars:
  - project: "{{ project }}"
  - repo: "{{ repo }}"
  - releasedir: "{{ releasedir }}"
  - run_composer: "{{ composer | default(false) }}"

  tasks:
  - name: Check node alive
    action: ping

  - name: Update {{ project }}/ from {{ repo.replace('ssh://', '') }}
    git: repo={{ repo }} dest={{ releasedir }} version=HEAD

  - name: Run composer install
    composer: working_dir={{ releasedir }}
    when: run_composer

  - name: Update {{ project }}/ owner/group
    file: path={{ releasedir }} mode=0664 owner=nginx group=nginx

  - name: Update {{ project }}/ permissions
    shell: chown -R nginx:nginx {{ releasedir }}*;
           chmod -R 664 {{ releasedir }}*;
           chmod -R a+X {{ releasedir }}*;