How do I switch a copy of the GIT tree to v3.5.13-sru??

All, I want to build a set of 3.5.13 packages for arch. I have made a copy of my GIT tree and I want to revert it back. I tried to follow Slavek's advice of using (switch to v3.5.13-sru branch) git checkout v3.5.13-sru && git pull && git submodule update However, that fails: 16:23 providence:~/pvd/tde13/tde> git checkout v3.5.13-sru error: pathspec 'v3.5.13-sru' did not match any file(s) known to git. I have seen the v3.5.13-sru label before during updates, but I can't figure out how to go back. What say the experts? -- David C. Rankin, J.D.,P.E.