Virtue signaling about the topic de jure (BLM, Women at Atlassian, etc.) and how they've sunk hundreds of engineering hours into changing all their repos from "master" to "main" thanks to the heroic work by their Diversity Inclusion and Equity in Engineering team.

Bet they wished they spent those hours elsewhere now.

I guess he is trying to make jokes to lift spirits while sitting behind some senior dev who has to take a deep dive into a legacy codebase no one touched in 5 years.