A quick shell script to delete local git branches en masse.

git-chipper

#!/bin/bash

# ## git-chipper
#
# Author:   Christopher Webb <hello@conspirator.co>
# Website:  http://conspirator.co
# License:  http://www.opensource.org/licenses/MIT
#
# Move to master branch. Delete all other local branches.
#

# Move to master branch
git checkout master

# Collect branches
branches=()
eval "$(git for-each-ref --shell --format='branches+=(%(refname))' refs/heads/)"

# Chip it up
for branch in "${branches[@]}"; do
  old="refs/heads/"
  branchName=${branch/$old/}
  if [[ "$branchName" != "master" ]]; then
    git branch -D $branchName
  fi
done