Many moons ago Yoann Padioleau put together a linux git repo with full history going back to 0.0.1. (The older releases aren't tagged, but it's all there for annotate and bisect and such.) His web page on it is still up, but the download links have bit-rotted. For historical purposes, I've mirrored his old build scripts.
Here's a more up to date tarball as of the 3.0 release, which pulls from the linux.git url instead of the old linux-2.6.git. Download this, extract it, do a "git checkout -f; git pull" and you should be ready to go.
This tree lets you log/annotate/bisect all the way back to 0.0.1, and the portion of the history in Linus's current tree has the same git hashes.