RMB - clean git repo

gistfile1.sh

function rmb {
  current_branch=$(git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')
  if [ "$current_branch" != "master" ]; then
    echo "WARNING: You are on branch $current_branch, NOT master." 
  fi
    echo "Fetching merged branches..." 
  git remote prune origin
  remote_branches=$(git branch -r --merged | grep -v '/master$' | grep -v "/$current_branch$")
  local_branches=$(git branch --merged | grep -v 'master$' | grep -v "$current_branch$")
  if [ -z "$remote_branches" ] && [ -z "$local_branches" ]; then
    echo "No existing branches have been merged into $current_branch." 
  else
    echo "This will remove the following branches:" 
    if [ -n "$remote_branches" ]; then
      echo "$remote_branches" 
    fi
    if [ -n "$local_branches" ]; then
      echo "$local_branches" 
    fi
    echo "Continue? (y/n): "
    read choice
    echo
	if [[ "$choice" =~ ^[Yy]$ ]]
	then
      # Remove remote branches
      git push origin `git branch -r --merged | grep -v '/master$' | grep -v "/$current_branch$" | sed 's/origin\//:/g' | tr -d '\n'`
      # Remove local branches
      git branch -d `git branch --merged | grep -v 'master$' | grep -v "$current_branch$" | sed 's/origin\///g' | tr -d '\n'`
    else
      echo "No branches removed." 
    fi
    git gc --aggressive
  fi
}