PSA - The default branch of the grass-website has been switch from ‘master’ to ‘main’. You will see this message next time you go to GitHub - OSGeo/grass-website: Web site of GRASS project (deployed from this repo twice a day) · GitHub
but if you don’t see the instructions to update your fork are as follows.
git branch -m master main
git fetch origin
git branch -u origin/main main
git remote set-head origin -a
You can confirm the change but running
git remote -v