collab: Set versions for git clone operations

roles/collab/tasks/main.yml

@@ -38,13 +38,17 @@
     creates: "{{ srcdir }}/moin-{{ moin_version }}"
     remote_src: true
 
+- name: Copy collabbackend packages
+  ansible.builtin.git:
+    dest: "{{ srcdir }}/collabbackend"
+    repo: "https://github.com/graphingwiki/collabbackend.git"
+    version: v1.1.1
+
 - name: Copy graphingwiki packages
   ansible.builtin.git:
-    dest: "{{ srcdir }}/{{ item }}"
-    repo: "https://github.com/graphingwiki/{{ item }}.git"
-  with_items:
-    - graphingwiki
-    - collabbackend
+    dest: "{{ srcdir }}/graphingwiki"
+    repo: "https://github.com/graphingwiki/graphingwiki.git"
+    version: master
 
 - name: Install foo.sh theme
   ansible.builtin.copy: