You're asked if you know how to use git, you say you can but you can't.
You decide to change your entire codebase because you realized your previous approach was a bad idea.
You ask how to change the old repository-content for the new project, you receive answer but you can't get it to work, you don't ask again for help.
What's the logical consequence? Create a public GitHub-Project and dump the entire customer-project under NDA into it -.-*