RE: http://www.mediawiki.org/wiki/Git_conversion
For Subversion SVN, ViewVC is a nice repository browser, which we also use on http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/
I searched for similar browsers for "git", but could not find similar ones.
My starting point was http://stackoverflow.com/questions/438163/whats-the-best-web-interface-for-g...
found: gitalist http://www.gitalist.com/ gitweb http://git.or.cz/gitwiki/Gitweb cgit http://hjemli.net/git/cgit/ FishEye (Atlassian, not free)
Perhaps, ViewVC can be "patched" to work with git ?
This page http://www.mediawiki.org/wiki/Git_Graphical_User_Interfaces is (currently) only dedicated to Git GUIs, not to Git Viewers: perhaps a page for Git Viewers should be started, too?