I followed the http://docs.openstack.org/developer/kolla/newton/quickstart.html (quick start guide) to install kolla 3.0.1 and everything works find.

Now, I am going to try the latest version of kolla(from git). In the quick start guild it mentions:

Warning Kolla uses PBR in its implementation. PBR provides version information to Kolla about the package in use. This information is later used when building images to specify the Docker tag used in the image built. When installing the Kolla package via pip, PBR will always use the PBR version information. When obtaining a copy of the software via git, PBR will use the git version information, but ONLY if Kolla has not been pip installed via the pip package manager. This is why there is an operator workflow and a developer workflow.

I am not understand about this. If I don't use pip to install kolla, then how I can have kolla-build and kolla-ansible commands?

Because when I check the code in git, the Dockerfile.j2 for horizon is more convenient than which installed by pip install kolla,

I also tried pip install kolla==4.0.0b1 but still not new enough to use the latest Dockerfile.j2 for horizon.

Anyway, in the quick start guide it says

there is an operator workflow and a developer workflow.

How to do the developer workflow?