You can debug the process with a:
set GIT_CURL_VERBOSE=1
git clone https://code.google.com/p/yourProject
Your environment variable %HOME%
should reference an existing directory (not necessarily C:\HOME
as in the tutorial, but any path you want), where _netrc
has been created.
Then, make sure your %HOME%\_netrc
file does contain:
machine code.google.com
login (your Gmail login, which is usually your email address)
password (your Gmail password)