Gineesh 
Git Cheat Sheet
# Checkout a new branch
git checkout -b new-branch
# push new branch to remote
git push -u origin new-branch
git push --set-upstream origin new-branch
# fetch the latest changes from remote
git fetch origin
# Merge the latest main into your branch
git merge origin/main
How to clean Git commit history
# Create Orphan Branch
git checkout --orphan temp_branch
# Add Files to Branch and commit
git add -A
git commit -am "the first commit"
# Delete master Branch
git branch -D main
# Rename temp/Current Branch to master
git branch -m main
# Push Changes to repo as master
git push -f origin main
Original post: How to Delete Commit History in Github