Delete all other local branches except master, develop or release/*

deleteLocalGitBranches.sh

#!/bin/bash

# Move to master branch. Delete all other local branches except master, develop, release/* or project/*

# Move to master branch
git checkout master

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

for branch in "${branches[@]}"; do
  old="refs/heads/"
  branchName=${branch/$old/}
  if [[ "$branchName" != "master" && "$branchName" != "develop" &&  "$branchName" != "release/"* ]]; then
    git branch -D $branchName
  fi
done