My Gentoo portage overlay, with mainline fixes and custom ebuilds.
Simply paste the following to /etc/portage/repos.conf/hhoffstaette.conf:
location = /var/db/repos/hhoffstaette
sync-type = git
sync-uri = https://github.com/hhoffstaette/portage.git
If you don't want to update the repository on every emerge --sync simply add
auto-sync = no