Git Prune zsh choice

.zshrc

## this can be in your .zshrc

function pruneBranches() {
    echo "thinkin..."
    git fetch --prune
    local lostInTheWoods=$(git branch -vv | grep 'gone]' | awk '{print $1}')
    if [[ -z "$lostInTheWoods" ]]; then
        echo "\nain't nuthin to prune"
        return
    fi
    if read -q "choice?going to prune...ok? [y/N]"; then
        echo "$lostInTheWoods"
    else
        echo
        echo "'$choice' not 'y' so not pruning."
    fi
}

alias doPrune="pruneBranches"