Delete all remote Git branches

git-purge-remote.sh

#!/bin/sh
# git-purge-remote.sh
# Deletes all remote branches for a given remote, except HEAD and main.

# Name of the remote to purge. Change if needed.
REMOTE_NAME=origin

# List all remote branches for the given remote, excluding HEAD and main.
# Pipe the branch names to git push to delete them
#   xargs -r prevents git push from running if there are no branches
git for-each-ref \
    --format='%(refname:strip=3)' \
    --exclude="refs/remotes/$REMOTE_NAME/HEAD" \
    --exclude="refs/remotes/$REMOTE_NAME/main" \
    "refs/remotes/$REMOTE_NAME" \
| xargs -r git push "$REMOTE_NAME" --delete