GIT things.
Deleting multiple local branches:
git branch | grep "<pattern>" | xargs git branch -DTracking an upstream fork:
git remote add upstream [email protected]:VENDOR/PROJECT.git
git fetch upstream
git checkout --track upstream/BRANCH_NAMESources:
https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/configuring-a-remote-for-a-fork https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/syncing-a-fork
git fetch origin pull/3/head:my_new_branch
git checkout my_new_branchSource: https://stackoverflow.com/questions/62432498/how-do-i-checkout-a-pr-from-a-fork