How to redirect a user from a specific domain using htaccess?

Question

htaccess

Hello. One lazy developer spars my site with a portfolio and links to my work. So I have access to all my works. I want to set up a redirect of all users who came to my clients' sites from the thief's domain to my own domain.
Found a solution:

RewriteEngine on
RewriteCond %{HTTP_REFERER} $(www.)?урл1.ru$
RewriteRule .* https://новыйурл.com/ [R=301,L]

but doesn't work...