The Fedora Project uses Koji for their build system, as do several other projects.

Koji's goal is to provide a flexible, secure, and reproducible way to build software.

Key features:

- New buildroot for each build
- Robust XML-RPC APIs for easy integration with other tools
- Web interface with SSL and Kerberos authentication
- Thin, portable command line client
- Users can create local buildroots
- Buildroot contents are tracked in the database
- Versioned data
This package contains the koji client that queries remote build systems as well as perform actions such as adding users and initiating build requests.