Hi Ken,
Are you using a Windows or Linux development environment? If you're using Windows, I would highly recommend using either Ubuntu-12.04 LTS or RedHat Workstation 6.5, since you'd waste a lot of time getting your Windows environment setup to do proper development for a linux target. It can be done, but it's going to affect your overall productivity.
I took a quick look at the wiki link and it appears to use git for source code control, but the commands mentioned a bit lower are missing 'git' before each command. You probably need to also install the git binaries on your OS, if you haven't done so already.
# To check the remote from which the git repo was cloned.
git remote -v
# To list all branches, local and remote.
git branch -a
# To create a local branch via a checkout, and set it to track a remote upstream branch. Do this only once.
git checkout -b xcomm_zynq_new_pcore_regmap --track remotes/origin/xcomm_zynq_new_pcore_regmap
# To report on the status of a branch.
git status
Regards,
Elvis Dowson