Prepare the mojo sauce. In a medium mixing bowl, stir together orange juice, lime juice, olive oil, minced garlic, minced jalapeno, minced cilantro, dried oregano, ground cumin, chili powder, and salt. Ingredients should be finely chopped. Refrigerate half of the sauce for later and use the remaining sauce in the mixing bowl as marinade for the chicken. Note, the sauce will oxidize so be sure to refrigerate quickly.