help on importing

Hi all,

I made several commits to a small local program. When I list them with "git log" I see them.

To publish my work, I choosed to sign in a forge (like github, google code,...). I choosed forge.ocamlcore.org

With my account creation, the forge automatically created an empty GIT repository.

I clone it with:
  git clone git+ssh://rakotomandimby@forge.ocamlcore.org/gitroot/ocaml-crypt/ocaml-crypt.git
  Initialized empty Git repository in /tmp/ocaml-crypt/ocaml-crypt/.git/
  warning: You appear to have cloned an empty repository.
I am surprised the initialisation is not in /tmp/ocaml-crypt/ocaml-crypt.git/.git/ 
as I pulled "ocaml-crypt.git".

Anyway...
When add+commit a file into "/tmp/ocaml-crypt/ocaml-crypt/", 
I get no errors, but when pushing:
  $ git push
  No refs in common and none specified; doing nothing.
  Perhaps you should specify a branch such as 'master'.
  fatal: The remote end hung up unexpectedly

I dont understand...

If I have success on this first simple steps, I could switch to the next level: Importing my local commits to that cloned repository ans then push that all.

I read several GIT documentation, but it seems I dont have the right keywords to have good results...

Would you help?