Be careful if you post your work on Github that you don't other to fork or copy because it is an open platform made for developers to share their work and allow others to improve it.

Github's license allows people to copy and states that if you post your work publicly know that it can be forked and copied. Unfortunately, your work @msg768 is publicly available. If you don't want people to copy or modify it, you should hide it from public view or Copyright it or delete it from Github.

Github license can be read here
Look at 5. License Grant to Other Users