Truncate git history

git-truncate.sh

# Prepare new_master
git checkout <hash-where-you-want-to-clip-history>
git checkout --orphan new-master
git checkout new_master
git cherry-pick first-commit-to-include^..last-commit-to-include

# Prepare master backup
git checkout master
git checkout -b master-backup

# Replace master
git branch -D master
git checkout new_master
git checkout -b master
git push --force origin master

# Delete the new_master branch as task is done
git branch -D new_master

# READ CAREFULLY, delete the master backup if sure that the task completed successfully
git branch -D master-backup