gitの特定のディレクトリをブランチ毎別リポジトリにする方法 ref: http://qiita.com/wataru420/items/f1eb7cf37fe5ba4980c3

file0.txt

mkdir ~/subproject

file1.txt

cd ~/
git clone baseproject subproject

file2.txt

cd ~/subproject/
git filter-branch --subdirectory-filter subproject -- --all

file3.txt

git branch -a

file4.txt

git checkout -b origin/feature001
git checkout -b origin/feature002

file5.txt

git remote rm origin
git remote add origin git@github.com:hoge/subproject.git
git push --all