Clear git history

gclear.sh

#!/bin/bash

default_branch=`basename $(git symbolic-ref --short refs/remotes/origin/HEAD)`

git checkout --orphan tmp
git add -A
git commit -m "first commit"
git branch -D $default_branch
git branch -m $default_branch
git push -f --set-upstream origin $default_branch
git gc --aggressive --prune=all