About the branches of the nommu in Linux

In this URL:

http://www.alterawiki.com/wiki/linux_sources

"

nios2 Development branch for Nios II Linux, contains support for Nios II with and without mmu (previously known as unstable-nios2mmu)

... ...

test-nios2 do not use - Old stable branch for Nios II without mmu.

"

In that URL:

http://www.alterawiki.com/wiki/downloading_linux_distribution

" To build without an mmu, use the test-nios2 branch on linux-2.6, and the test-nios2 branch on uClinux-dist.

"

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[root@localhost linux-2.6]# git checkout nios2

error: pathspec 'nios2' did not match any file(s) known to git.

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Without MMU, which branch should I selected in the linux-2.6 and uClinux-dist folders of the nios2-linux-20100621?

It makes me Crazy ...