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How to delete commit history from github repository

bash script to delete history of commits from github repository

#!/usr/bin/env bash

## delete commit history

branch=$(git branch --show-current)
git checkout --orphan latest_branch # Move to new branch with new object
git add -A # Add all files
git commit -am "Prune at $(date)" # Commiting the changes
git branch -D $branch # Deleting master branch
git branch -m $branch # Renaming branch as master
git push -f origin $branch # Pushes to master branch
git reflog expire --all --expire=now --verbose # remove logs
git gc --aggressive --prune=all # remove the old files
git count-objects -v # count current objects