This ebuild adds experimental git-subtree command (see URL).
Created attachment 263075 [details] git-subtree ebuild
URL only returns 404
from github-repository: "Hi, This git-subtree repository is obsolete now that git-subtree has been merged into mainline git (yay!). If you have patches you want to make to git-subtree, I encourage you to email them to the core git mailing list, where the hordes of awesome maintainers are well known for responding very quickly to queries and patches, very much unlike me. Thanks! Avery"
https://github.com/git/git/commit/634392b26275fe5436c0ea131bc89b46476aa4ae should be in git 1.7.11