There are no test versions newer than current stable one. You can try to compile git code yourself in order to get the very latest features and fixes. Click here for more info.
Templates for GNU/Linux: contains project's template, autocompletion index and html reference; library's binaries should be installed with your distribution's package manager.
Templates and library for Windows: contains project's template, autocompletion index, library's reference and also library's binaries.