First, my question is different from Create a submodule repository from a folder and keep its git commit history .

Suppose I have git folder, let's say ~/GITA.
I want to move a folder ~/Folder1 into it. (~/GITA/Folder1).
Then in the folder (~/GITA/Folder1), change it into submodule.
And then push it (submodule ~/GITA/Folder1) to the new created server repository.