Mocha is a port city in Yemen. Whether you believe Ethiopia, Eritrea, Somalia, Yemen, or another Red Sea country is the birthplace of coffee, it is inarguable from that region. Hence why people associate moka/mocha/mokah with coffee.
In my opinion, Yemeni dry-processed Moka is the greatest coffee in the world. And, if you can find the Qishr tea (brewed using the hulls from the dry processed green coffee beans) you are in for a great treat.