Until Richfaces 4.1.M1 (release date in 9 th August) won't be nightly builds AFAIK.

I tell you below how I did it:

1. Create a directory where we will store all richfaces source code.
2. Inside this directory, we will download repositories from richfaces git:
   • git clone https://github.com/richfaces/parent.git
   • git clone https://github.com/richfaces/build.git
   • git clone https://github.com/richfaces/components.git
3. Then, install Maven 3 binaries.
4. Inside parent and build directories, execute:
   • mvn clean
5. Then, inside components directory, execute:
   • mvn clean
   • mvn install

If everything went successfully, all the jars will be inside your maven local repository (in linux defaults to .m2/repository) in org/richfaces directory.

You can repeat the process updatinh the source doing this (inside all of the 3 directories):

  git pull

And that's all!