I was wondering if I can delete all commit history in Github, especially for those newly published projects that you commit six times to fix a comma in the README.md file.

Apparently, deleting the .git directory is a terrible idea, because that creates many problems in your repository.

The best solution is to check out a new branch, add all files to it, commit, delete the master branch, and then rename the new branch to master.

Steps to do that:

1. Checkout
   git checkout --orphan latest_branch

2. Add all the files
   git add -A

3. Commit
   git commit -am "message"

4. Delete the master branch
   git branch -D master

5. Rename the current branch to master
   git branch -m master

6. Finally, force update your repository
   git push -f origin master