Commit messages:
http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
http://who-t.blogspot.com/2009/12/on-commit-messages.html
http://progit.org/book/ch5-2.html#commit_guidelines
Linus on rebasing vs. merging and preserving history:
http://article.gmane.org/gmane.comp.video.dri.devel/34744
http://article.gmane.org/gmane.linux.acpi.devel/32901
http://article.gmane.org/gmane.linux.kernel/638612
http://article.gmane.org/gmane.linux.kernel/638628
http://article.gmane.org/gmane.linux.kernel/638824
http://article.gmane.org/gmane.linux.kernel/638862
http://article.gmane.org/gmane.linux.kernel/638872
http://article.gmane.org/gmane.linux.kernel/638941
http://article.gmane.org/gmane.linux.kernel/671337
http://article.gmane.org/gmane.linux.kernel/681763
Workflows:
http://longair.net/blog/2009/04/16/git-fetch-and-merge/
Linus on (not) tracking renames:
http://article.gmane.org/gmane.comp.version-control.git/97
http://article.gmane.org/gmane.comp.version-control.git/102
http://article.gmane.org/gmane.comp.version-control.git/207
Linus on over-engineering:
http://article.gmane.org/gmane.comp.version-control.git/505