Gogol Bordello’s Eugene Hutz and Les Claypool of Primus have always fought propaganda with art. Both leaders of genre-defying rock acts more concerned with breaking rules than following formula, Hutz and Claypool watched with horror as Russia invaded Ukraine on Feb. 24. Then the two went to work. To raise money for Nova Ukraine, a non-profit that gives humanitarian relief to the people of Ukraine, Hutz, Claypool, Sean Lennon, Police drummer Stewart Copeland and others recorded a blunt, bold charity single with a defiant tone, full of East-meets-West art punk grooves and lyrics that celebrate Ukraine president Volodymyr Zelenksyy’s epic display of courage.