Git repository cleanup slimming

The first step to find large files or add files by mistake

git rev-list --objects --all | grep "$(git verify-pack -v .git/objects/pack/*.idx | sort -k 3 -n | tail -5 | awk '{print$1}')"

The second step, is removed from the warehouse in a file or folder

Deleted files, will be replaced bigfile above to find the file name

git filter-branch --force --index-filter \
  'git rm --cached --ignore-unmatch bigfile' \
  --prune-empty --tag-name-filter cat -- --all

Delete a folder, find the wrongdir into the above folder

git filter-branch --force --index-filter \
  'git rm -r --cached --ignore-unmatch wrongdir' \
  --prune-empty --tag-name-filter cat -- --all

The third step is to delete cached objects

You can skip this step, after confirming complete problem does not occur again until the execution (it can be said that these cached objects gives you a chance to undo the last operation).

git for-each-ref --format='delete %(refname)' refs/original | git update-ref --stdin
git reflog expire --expire=now --all
git gc --prune=now

The fourth step is to update the remote repository

(This step is executed, it really can not be saved. Please check backed up.)

git push --force --verbose --dry-run
git push --force