Scenario:
- I have a huge (first) git repository with long history.
- I exported the latest snapshot of it (I took latest HEAD and removed the .git directory)
- I created a new (second) git repository, with this export as the initial commit.
- I have continued to update this NEW repository. During all this time, I didn't touch the old repository (no new commits were done there).
Now, I would like to concatenate the two, to a single one big repository (and get the same final result as if I simply committed all the work that was done on the second repository, to the first repository). How can I do it with git commands?