off of "origin/hack" (or "remotes/origin/hack", or even
"refs/remotes/origin/hack"). If the given name has no slash, or the above
guessing results in an empty name, the guessing is aborted. You can
-exlicitly give a name with '-b' in such a case.
+explicitly give a name with '-b' in such a case.
--no-track::
Ignore the branch.autosetupmerge configuration variable.