The sperm is what makes the child (along with the egg, obviously), which is what is meant by "the germline is unaffected". Thus, the child will have the DNA of

The sperm is what makes the child (along with the egg, obviously), which is what is meant by "the germline is unaffected". Thus, the child will have the DNA of the mother and the father. The donor doesn't really factor in to that story. Given the generally separate nature of testicles, it would be really surprising if that wasn't the case.