Git checkouts must contain explicit version

roles/news/tasks/selfoss.yml

@@ -2,6 +2,7 @@
   git: repo=https://github.com/SSilence/selfoss.git
        dest=/var/www/selfoss
        accept_hostkey=yes
+       version=master
 
 - name: Set selfoss ownership
   action: file owner=root group=www-data path=/var/www/selfoss recurse=yes state=directory

roles/webmail/tasks/roundcube.yml

@@ -53,6 +53,7 @@
   git: repo=https://github.com/alexandregz/twofactor_gauthenticator.git
        dest=/usr/share/roundcube/plugins/twofactor_gauthenticator
        accept_hostkey=yes
+       version=master
 
 - name: Link plugins into /var/lib/roundcube/plugins
   file: state=link src=/usr/share/roundcube/plugins/{{ item }} dest=/var/lib/roundcube/plugins/{{ item }} force=yes