git push of subtree-remote推送了整个repo，如何撤消？

Question

I Git merged my repo feklee-node into my repo san . Commands

$ git remote add -f node git@github.com:feklee/feklee-node.git
$ git merge -s ours --no-commit --allow-unrelated-histories feklee-node/master
$ git read-tree --prefix=node/ -u node/master
$ git commit # done from Emacs Magit IIRC
$ mv node/ nodes/pcb/

Then I did some changes in the repo san , and I wanted to get the changes in the subtree back into feklee-node . So I did (which obviously was a bad idea):

$ git push node master # node = git@github.com:feklee/feklee-node.git

This pushed the entire contents of san into feklee-node . Oh no!

How do I undo this massive git push?

And also I wonder how to push only the subtree.

Update

I reverted back to an old commit, rewriting history:

$ git reset --hard 87b2d1aaea1c0a628c4725e2ea16682f344f102e
$ git push --force

Here I was lucky because I still had a browser tab open with the GitHub repo in the state before the massive push. It showed the above hash.

Answer 1

In order to undo a commit use

git revert

Pushing only to a subtree should look something like this:

git subtree push --prefix=my/folder subtree_origin master