$ arc help land
...the upstream of the current branch, recursively...
This means the branch selected by arc land <target>, not the branch checked out in the working copy at the time arc land runs, and could be more specific.
$ arc help land
...the upstream of the current branch, recursively...
This means the branch selected by arc land <target>, not the branch checked out in the working copy at the time arc land runs, and could be more specific.