Smoked Brisket Tacos

Name: Smoked Brisket Tacos
Ingredients: ½ cup rice vinegar; ½ cup hot water; 2 tablespoons granulated sugar; 1 tablespoon kosher salt plus 1/2 teaspoon, divided; 2 jalapeño peppers, thinly sliced into rounds; 1 clove garlic, smashed and peeled, plus 1 clove minced, divided; ¼ cup whole-milk plain Greek yogurt; 3 teaspoon lime juice, divided, plus lime wedges for serving; ¼ teaspoon ground pepper, divided; 3 radishes, very thinly sliced; 2 avocado, sliced; 1 tablespoon extra-virgin olive oil; 1 bunch scallions, trimmed and cut into thirds; 1 pound sliced Grill-Smoked Barbecue Brisket (3 cups); 12 corn tortillas, warmed; 1 cup crumbled cotija cheese; 1 cup fresh cilantro leaves