timewarping with git

timewarp.sh

#!/bin/bash
uncached=$(git diff --cached)
echo $uncached
if [ "$uncached" == "" ]; then
        read -p "There is no cachediffrence, you probably already comitted. Do you want to DESTROY the last commit?? Type yes: " yes
        if [ "$yes" == "yes" ]; then
                git reset --hard HEAD~1
        fi
else
    	read -p "There is a cachediffrence, you probably added the files but didnt commit them. Do you want to DESTROY the uncommited files ?? Type yes: " yes
        if [ "$yes" == "yes" ]; then
                git stash -u
        fi
fi