try fix detached head in travis - see: travis-ci/travis-ci#1701

Author: mitchellkrogza

travis-ci/deploy2.sh

@@ -2,6 +2,8 @@
 YEAR=$(date +"%Y")
 MONTH=$(date +"%m")
 cd $TRAVIS_BUILD_DIR
+git clone --branch=$branch $repo
+git reset --hard $sha1
 git config --global user.email "${GIT_EMAIL}"
 git config --global user.name "${GIT_NAME}"
 git config --global push.default simple