Изтриете хранилището на git

//delete locally
git branch -d branch_name

//delete remotely
//git push <remote_name> :<branch_name>
// ex. git push origin :serverfix

rm -rf .git

rm -rf .git

NU

git init
git add README.md
git commit -m "first commit"
git remote add origin https://github.com/Leonuch/flex.git
git push -u origin master