root@localhost project-android]#git clone git://android.git.kernel.org/kernel/common.git

[root@localhost src]#cd common

[root@localhost common]# ls
arch CREDITS drivers include Kbuild MAINTAINERS net samples sound
block crypto firmware init kernel Makefile README scripts usr
COPYING Documentation fs ipc lib mm REPORTING-BUGS security virt
[root@localhost common]# git branch -a
* android-2.6.27
diff
remotes/origin/HEAD -> origin/android-2.6.27
remotes/origin/android-2.6.25
remotes/origin/android-2.6.27
remotes/origin/android-2.6.29
remotes/origin/android-goldfish-2.6.27
remotes/origin/android-goldfish-2.6.29

要想下载2.6.29内核，只要最后执行一下git checkout origin/android-2.6.29