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

Instructions to ask before execute git checkout (aliased to git co):

• Copy ask_before_checkout.sh in a folder included in $PATH (or include the folder).
• Type this:

git config --global alias.co '!sh ask_before_checkout.sh'

Note: The bang at the start of the alias means "run the following as commands to the shell".

So useful!