If you found such a thing, how would you know? There is no way of traversing hash collisions. It would be the hash of some string of cryptocurrency jarble that

If you found such a thing, how would you know? There is no way of traversing hash collisions. It would be the hash of some string of cryptocurrency jarble that also happens to be the hash of some encoding of the libgen database and you would have no way of knowing this unless you specifically hashed all of libgen. In this case you know all of libgen already anyway, unless you forgot the information that you hashed.