GIT , Remove all old changes and make Current as initial

This is the brute-force method. It also removes the configuration of the repository.

Step 1: remove all history
rm -rf .git

Step 2: reconstruct the Git repository with current content
git init
git add .
git commit -m "Initial Commit"

Step 3: push to Git.
git remote add origin <git-uri>
git push -u --force origin master