You can use the quicksearch. When the focus is on the revision grid, just start typing and you will jump to the commit containing the text. Both commit-hashes and tags are searched.
Subject: Search for Commit-Hash, Tags
Date: Wed, 2 Mar 2011 13:59:04 +0100
From:
harald.de...@med.ge.comTo:
gitext...@googlegroups.com