Create a backup of changed git files for some reason

.gitback

function gback()
{    
    #Setup backup dir name  
    name=`date +"%I:%M:%S"` 
    date=`date +"%d-%m-%y"`
    dir="/home/"$USER"/Desktop/store/$date/$name"
    mkdir -p $dir 
    
    #Store git diff result for reference
    echo "Generate: git diff results.." 
    git diff  --color . > $dir/git.diff  

    #Copy only changed files
    echo "Copy: only changed files.."
    zip -r $dir/src.zip `git diff --relative --name-only .`
    
    #Check if copy was successful 
    if [ $? -ne 0 ]   
    then
        echo " "
        echo "Copy: Failed.."
        echo "Copy: Aborting git reset --hard"
        return
    else
        #Run git reset --hard
        echo "Backup created at $dir" 
    fi 
}

Running a gback command

Creates a backup of

1. Changed files
2. Colored git diff result for reference

Where?
/home/user/Desktop/.store/Date/Time/src.zip

---

Usage

Step 1 -
Save this file in your home directory and name it .gitback

Step 2 -
Open ~/.bashrc and add the below line at the end.
source ~/.gitback

Step 3 - run gback to create a backup