unversioned
pinned_version==1.0
ranged_version>=1.0,<=2
git+ssh://git@url/path/to/repo.git@1.0.0#egg=url
git+ssh://git@url/path/to/repo.git#egg=unversioned_url
-e git+ssh://git@url/path/to/repo.git@master#egg=editable
