It might be needed for you to mount your windows drive with the 'noattrib' options in order to be able to use git in a folder on your windows drive.
If you want you can also add the "dmode=0775,fmode=0664" options to the mount command if you don't want all your files to be executable by default.
This is the error I got before setting noattrib:
- error: file write error (Operation not permitted)
fatal: unable to write sha1 file