How do I find my git committer name?

The committer name is determined by your SCM tool (assuming your script that posts to Lighthouse sets it properly). For git, you would git log commit a specific commit ID. The "author" of the commit is your git name.

In the example below, the git committer name is "rick".

$ git log commit 3d1902ec686fef44e603bde8501b13c5feb4ec41
Author: rick technoweenie@gmail.com
Date:   Tue Sep 8 10:56:00 2009 -0700
Version bump to 1.1.3