File '_netrc' / '.netrc' is not accepted by Git

Assuming you did everything that was described in this answer and you set the right location for your %HOME% environment variable (confirm this with an echo %HOME% and check that in that location there's a _netrc file), there must something be wrong in the usage of your repository.

The URL to clone a Google Code repository is https://user.googlecode.com/svn/trunk (see this Google link for that).

So, you have to do a

git svn clone https://user.googlecode.com/svn/trunk

in order to import your Google repository.