title: any project about version control system
body: <p>recently i opened a repository in github and after i saw other version control system on google but i wanted to know how they work and maybe do a small project on it because i am student in university and i searched online for free source code working like github or any other website but i didn't get them so if someone has  the simple project project that has the logic of a version controller or maybe tell me the login  behind them and  i can start working on it i use mostly python and java </p>