FastBack is a Minecraft mod that provides fast, incremental world backups using Git. It stores backup snapshots as orphan branches in a Git repository embedded within the world save directory, enabling efficient storage of only changed files. The mod supports local backups, remote backups to any Git server or file system, automatic scheduling on shutdown or autosave, snapshot pruning with configurable retention policies (daily, fixed, GFS, all), and restoration of snapshots. It requires native git and git-lfs to be installed, with a fallback to JGit for legacy backups. The architecture is modular: a common module contains all backup logic (commands, repo management, config, logging, mixins), while Fabric and NeoForge loader-specific modules handle platform integration. The codebase demonstrates strong engineering practices with clean interfaces, robust error handling, comprehensive logging, and a well-designed retention policy system.