It’s officially game week. After weeks and weeks of practice, the show begins on Saturday for the Kentucky football team. The challenges will be just as mental as they are physical. Mark Stoops has complimented the demeanor of his new offensive coordinator, Bush Hamdan. He never gets too high or too low. The play-caller is preaching the same thing to his players when they take the field for the first time Saturday night against Southern Miss. “There’s so many mental battles going on, one of which is that mental toughness battle,” Hamdan said after Tuesday’s practice. “More than anything for us…