$ git checkout --orphan NEWBRANCH
$ git rm -rf .
--orphan
creates a new branch, but it starts without any commit. After running the above command you are on a new branch "NEWBRANCH", and the first commit you create from this state will start a new history without any ancestry.
You can then start adding files and commit them and they will live in their own branch. If you take a look at the log, you will see that it is isolated from the original log.
Hi, with this are we able to merge to master branch when done with the changes?