Cleaning Up Gitlab Files

Hi, I am trying to delete everything in the gitlab repository, so I simply make a commit with no files. But the thing is that Gitlab database kept all my files, so every time I check out from gitlab, even with nothing in master or other branches, it still has 5300 objects to pull from. My Question is, is there anyway that I can clean up everything, even the gitlab data base, and reconstruct a new repo(with 0 objects, just brand new)? I don’t want to pull 5300 objects, when I don’t need anything. Thanks.