Using the issues log - rogerswingle/spinnaker GitHub Wiki
The convention is that each issue will map to a single issue in another spinnaker repository. This allows easy tracking of milestone progress.
To close both issues with a git commit, follow the instructions here. For example, to close issue #44 in Kato and its corresponding issue in spinnaker is #30, your commit message could be:
do blah; fixes #44 and closes spinnaker/spinnaker#30