How to delete all branches except for master locally and on a remote

DeleteAllBranchesExceptMaster.md

Delete all local branches except for master

git branch | grep -v 'master$' | xargs git branch -D

Delete all remote branches except for master

REMOTE_NAME="origin"
command -v parallel || brew install parallel
git branch -r | grep $REMOTE_NAME/ | grep -v 'master$' | grep -v HEAD | cut -d/ -f2- | parallel git push $REMOTE_NAME --delete

Need to add another exclusion beyond master?

Just add the following after grep -v 'master$' to one of the above two commands:

 | grep -v 'branch_name_to_exclude'

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