He took his shot — and hit nothing but net.

A longtime street musician scored his dream gig with the Knicks last week when two Madison Square Garden execs happened upon his drumming performance outside the World’s Most Famous Arena.

“What are the odds of you just walking past while I’m here trying to bust my ass in the cold trying to pay my rent?” Cornelio Joseph told the dazzled execs.

“Hey, let me know if there’s any opportunity for entertainment at the Garden,” he told them.

Longtime busker Cornelio Joseph has been pounding the pavement — and his homemade snare drums — for years before catching his big break playing for the Knicks at MSG.…