[-e] git+https://git.example.com/MyProject.git@master#egg=MyProject
[-e] git+https://git.example.com/MyProject.git@v1.0#egg=MyProject
[-e] git+https://git.example.com/MyProject.git@da39a3ee5e6b4b0d3255bfef95601890afd80709#egg=MyProject
[-e] git+https://git.example.com/MyProject.git@refs/pull/123/head#egg=MyProject