Additional git related tasks for the phing build tool.
Phing currently comes with several tasks for interacting with git repositories, but it also lacks some that I have a need for. Thus, I am implementing them myself by extending phing's provided GitBaseTask class. I've implemented them more or less, and have submitted them to the phing maintainers for inclusion in a future release.
Installing these extra tasks is fairly straightforward, but first you need to locate your phing installation. In my case, I installed phing via pear, which was installed as part of Zend Server CE; my phing installation is therefore located in /usr/local/zend/share/pear/phing. Simply copy the Git*Task.php files from this repository into $PHING/tasks/ext/git/ and define them in your build.xml file as taskdef entries (similar to what is done in this repo).