So given you didn’t read it - the engineers were told to print out their last 30 days of changes so that musk could read it.
Then they were told to shred it a few hours later.
This had nothing to do with VCS (which they obviously use), and everything to do with musk’s ego.
The way I view it is that it's more or less a way to harass people. Get them to print out code and then if you do follow-up, you can weed out people that rebuke your authority.
He was never going to read the code (or even really understand it), it's just pettiness from a petty person.