You could request the bank get the hole reinspected, but the thing is, if there's a hole in the roof and they're just fixing that hole, you may find it's not the only problem. Roofs are like window leaks. It's a trial and error thing. Sometimes you fix one part of a roof, only to find it's leaking somewhere else too. As far as black mold, if it's stated in your inspection that there's mold, you are responsible for it down the road if you sell the house. What I mean is if you are aware there is mold, you have to disclose that. If there's paperwork saying there's mold, then you are "aware" and in order to protect yourself from potential lawsuits, you'd also have to have paperwork and receipts showing that A)you got it fixed and how it was fixed and B) the results of testing showing that there is no longer black mold. If you get the test results back and it's black mold, definitely ask the bank to hire a company to go in and take care of it, and also require another test to be done afterwards to be sure it's gone.
A little bit of black mold, like say on walls above showers, can be treated with a mixture of 1/2 water 1/2 bleach in a spray bottle, but if you have it in the drywall or floorboards, then you're talking some major repair work that would need to be done.