Performing shallow clone of Git repos

This should help decrease build times.

ECOM-6600

Cherry pick from 64facf1b

playbooks/roles/git_clone/tasks/main.yml

@@ -61,6 +61,7 @@
     version: "{{ item.VERSION }}"
     accept_hostkey: yes
     key_file: "{{ git_home }}/.ssh/{{ item.REPO }}"
+    depth: 1
   become_user: "{{ repo_owner }}"
   register: code_checkout
   when: item.PROTOCOL == "ssh" and GIT_REPOS is defined
@@ -75,6 +76,7 @@
     repo: "https://{{ item.DOMAIN }}/{{ item.PATH }}/{{ item.REPO }}"
     dest: "{{ item.DESTINATION }}"
     version: "{{ item.VERSION }}"
+    depth: 1
   become_user: "{{ repo_owner }}"
   register: code_checkout
   when: item.PROTOCOL == "https" and GIT_REPOS is defined