gta02 kernel for qemu

[Pupino]

Hi all,
i was trying to emulate the gta02 on qemu, but i find i can't patch the
kernel.
I'm following the instructions included in the README in the qemu/openmoko
folder.
What fail is this:
cg-switch -r fbfbc5130075e233f2fd2613e2897c3c4ed4bc7f gta02fake

and fails telling:
error: unable to find fbfbc5130075e233f2fd2613e2897c3c4ed4bc7f
fatal: git-cat-file fbfbc5130075e233f2fd2613e2897c3c4ed4bc7f: bad file
error: unable to find fbfbc5130075e233f2fd2613e2897c3c4ed4bc7f
fatal: git-cat-file fbfbc5130075e233f2fd2613e2897c3c4ed4bc7f: bad file
Invalid commit id: fbfbc5130075e233f2fd2613e2897c3c4ed4bc7f

any one knows what's wrong?

Thanks in advance.
Davide
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