Can Julia Pkg.submit be used under windows?

Julia's built-in package handling is very handy and I would like to use it for code injection. However, I was unable to get Pkg.submit to work on a Windows machine. Could anyone have done this, and if so, how did you do it?

The problem seems to be related to starting the ssh agent when calling git from julia. I tried to start it automatically by making this into a copy of Julia.profile but couldn't get it to work. Any ideas?