As - hopefully - lots of people know, we have a CI-instance running which is using the t_functional repository to test CentOS-5 and CentOS-6 images on a daily basis. These tests are then in turned used in the automated QA-process once a new point release is in that stage.
These tests will have to be adapted to also work on CentOS-7 once it will reach QA. So feel free to install git on RHEL7b1, clone the t_functional repository and start testing/changing/pushing merge requests. Some tests will surly fail, especially those which check trademarks, but that's to be expected at this point.
More information about t_functioncal can be found in the CentOS wiki at wiki.centos.org (here and here).