git-pull: "Cannot obtain needed none"?

Sometimes I wonder what language do we use in user-visible messages :)
What none was it, which could not be obtained? Why could none be needed?
Why does it happen processing commit 00000...?

error: Unable to find 9a6e87b60dbd2305c95cecce7d9d60f849a0658d under
http://www.kernel.org/pub/scm/git/git.git/
Cannot obtain needed none 9a6e87b60dbd2305c95cecce7d9d60f849a0658d
while processing commit 0000000000000000000000000000000000000000.

Complete trace:
GIT_TRACE=1 git pull
trace: exec: '/d/scripts/git/git-pull'
trace: built-in: git 'rev-parse' '--git-dir'
trace: built-in: git 'rev-parse' '--git-dir'
trace: built-in: git 'symbolic-ref' 'HEAD'
trace: built-in: git 'repo-config' '--get' 'branch.raa/2.remote'
trace: built-in: git 'repo-config' '--get' 'remote.origin.url'
trace: built-in: git 'repo-config' '--get' 'remote.origin.url'
trace: exec: '/d/scripts/git/git-ls-remote'
'http://www.kernel.org/pub/scm/git/git.git'
trace: built-in: git 'repo-config' '--get' 'remote.http:.url'
trace: built-in: git 'repo-config' '--bool' 'http.noEPSV'
trace: built-in: git 'repo-config' '--get' 'remote.origin.url'
trace: built-in: git 'symbolic-ref' 'HEAD'
trace: built-in: git 'repo-config' '--get' 'branch.raa/2.remote'
trace: built-in: git 'symbolic-ref' 'HEAD'
trace: built-in: git 'repo-config' '--get-all' 'branch.raa/2.merge'
trace: built-in: git 'check-ref-format' 'heads/git'
trace: built-in: git 'check-ref-format' 'heads/pu'
trace: built-in: git 'check-ref-format' 'heads/next'
trace: built-in: git 'repo-config' '--bool' 'http.noEPSV'
Fetching refs/heads/master from
http://www.kernel.org/pub/scm/git/git.git using http
trace: built-in: git 'rev-parse' '--verify'
'6f9872582246b9b8ee4bdc9f6a563b409aab1ecb^0'
trace: built-in: git 'cat-file' '-t' '6f9872582246b9b8ee4bdc9f6a563b409aab1ecb'
trace: built-in: git 'rev-parse' '--short'
'6f9872582246b9b8ee4bdc9f6a563b409aab1ecb'
trace: built-in: git 'repo-config' '--bool' 'http.noEPSV'
Fetching refs/heads/pu from http://www.kernel.org/pub/scm/git/git.git using http
Getting alternates list for http://www.kernel.org/pub/scm/git/git.git/
Getting pack list for http://www.kernel.org/pub/scm/git/git.git/
error: Unable to find 9a6e87b60dbd2305c95cecce7d9d60f849a0658d under
http://www.kernel.org/pub/scm/git/git.git/
Cannot obtain needed none 9a6e87b60dbd2305c95cecce7d9d60f849a0658d
while processing commit 0000000000000000000000000000000000000000.

FWIW, a patch changing it to:
git fetch
Fetching refs/heads/master from
http://www.kernel.org/pub/scm/git/git.git using http
Fetching refs/heads/pu from http://www.kernel.org/pub/scm/git/git.git using http
Getting alternates list for http://www.kernel.org/pub/scm/git/git.git/
Getting pack list for http://www.kernel.org/pub/scm/git/git.git/
error: Unable to find 9a6e87b60dbd2305c95cecce7d9d60f849a0658d under
http://www.kernel.org/pub/scm/git/git.git/
Cannot obtain needed object 9a6e87b60dbd2305c95cecce7d9d60f849a0658d

attached.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>

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