xorg-server-1.8.99.904 tag

[Jeremy Huddleston]

I'm having some issues with my normal way of generating patches off of master.  With a current state, I run:

$ git format-patch xorg-server-1.8.99.904...origin/master
0001-Revert-dix-use-the-event-mask-of-the-grab-for-TryCli.patch
0002-xkb-remove-now-obsolete-comment.patch
0003-dix-fix-up-erroneous-error-message.patch
...

0001 corresponds to commit 1884db430a5680e37e94726dff46686e2218d525
http://cgit.freedesktop.org/xorg/xserver/commit/?id=1884db430a5680e37e94726dff46686e2218d525

and doesn't apply to the clean 1.8.99.904 tarball:

$ tar -xjf xorg-server-1.8.99.904.tar.bz2
$ cd xorg-server-1.8.99.904
$ patch -p1 < patches/0001-Revert-dix-use-the-event-mask-of-the-grab-for-TryCli.patch
patching file xorg-server-1.8.99.904/dix/events.c
Reversed (or previously applied) patch detected!  Assume -R? [n] 
Apply anyway? [n] 

Was the tag applied to the wrong commit, or am I missing something here?