ask_before_checkout

#!/bin/sh

if [ "$#" -ge 1 ]; then
    echo "Are you sure (y/n)?"
    read answer
    
    # Abort unless enter was pressed, or "y" written
    if [ "$answer" = "y" ] || [ "$answer" = "" ]; then
        git checkout "$@"
    else
        echo "aborted"
    fi
else
    echo "Incorrect number of arguments"
fi

So useful!