All Horde packages (horde3, imp4, kronolith2…) were in GNU Arch repository. After Lenny release, we decided to migrate to Git. Git has a lot cool features, and I was convinced by Pierre Habouzit talk about Packaging with Git. Technically, I used git-archimport to keep all history of packaging. Each package has a Git repository with some branches: upstream, upstream+patches, upstream+repack (if needed), pristine-tar, debian-sid (imported from GNU Arch) and debian-<release>. The hardest step was to set up a common ancestor for debian-sid and upstream branches: I found git-merge-unrelated-branch script to do it automagically. I write guidelines for packaging Horde with Git on Debian Wiki with some notes about migration from GNU Arch to Git. Comments welcome!