How can I get a hostel in Heritage Institute of Technology?

You can apply for the hostel during admission. While taking admission ask about the hostel facilities and they will guide you. 

You should note that the hostel seats are assigned on a first-come, first-served basis. So, if you need a hostel, try to get in as soon as possible. After you've been admitted, go to the relevant counter and pay a deposit. 

However, I strongly advise you not to stay in a college hostel, particularly if you are a boy because the environment and amenities are inadequate. You can easily find pg may be in the RR Plot and Hussainpur area. These locations are close to the campus.