Well there are discussions about renaming "master" to "main" in git.

https://www.zdnet.com/article/github-to-replace-master-with-alternative-term-to-avoid-slavery-references/

I created a new branch "main" and that will be our new default branch from now on.

Not sure what you have to do.. maybe this will help:

git pull
git checkout origin/main -b main

The master branch will be kept for a little while and then I envision we will remove it when we see no need for it anymore.