Sometimes You just do not want to push right away during arc land
--hold is the way to go
$ arc land --onto master --hold
...
...
BUILDS PASSED Harbormaster builds for the active diff completed successfully.
HOLD Holding change locally, it has not been pushed.
This local working copy now contains the merged changes in a detached state.
You can push the changes manually with this command:
$ git push -- origin ae12...eeee