mkdir corpus
cd corpus
git init
git checkout --orphan gh-pages
git add .
git commit -m 'first commit'
git remote add origin https://github.com/mobilesite/corpus.git
git push origin gh-pages
git clone https://github.com/mobilesite/corpus.git
git checkout gh-pages
git config user.name xxx
git config user.email xxx@xxx.xxx.xxx
git add .
git commit -m 'update'
git push origin gh-pages