Git support through symbolic link

I have a situation which I don't know if it's possible for intellij idea to support.

I have a project implemented in a product and, to build the project, the files you edit must be inside the product's directory. Now, putting all the product in version control would be bad, so the solution used is to create a symbolic link to the src folder that is under git. Illustrating with made-up folders:

c:\product\

    \custom ---> c:\vcs\src

c:\vcs

    .git

    src

Now, when I import the project in idea, I must import the directory c:\product, so Idea can identify everything, but then Idea can't see that the folder c:\product\custom is actually under source control.

Now, the question:

Is there any way, under Idea, to setup things so that it knows that the folder c:\product\custom is actually a link to another folder that is under source control, so that I can use all vcs integration normally?