You will not find any OpenOCD binaries here, nor are there any official releases of OpenOCD as of writing.
Also note! if you check out the latest version of OpenOCD from git you should know that it is work in progress and it may very well be better for you to get a slightly older version. The official OpenOCD git server is hosted at http://openocd.sourceforge.net/.
If you want to get actual work done and not play around with OpenOCD development(fun as it is…), then your best bet is to get the latest recommended version from your hardware debugger supplier.
OpenOCD Project:
http://developer.berlios.de/projects/openocd