how to use Push in grit using method_missing method

Question

I am trying to do push using grit.. however I am unable to figure out what all parameters are to be passed in rmpush.push command below.. I have already created a remote alias using git remote add and its working fine.

location = 'D:\GritRepo'
repo = Grit::Repo.init(location)
rmpush = Grit::Git.new(location+'\.git')
# this works fine
repo.remote_add("remoterep","https://github.com/ahmadosama/GritRepo.git")
# need help here
rmpush.Push({:repo=>'remoterep', :remote=>'master'})