How to find a revision's branch name

In today git archive, todo branch.

$ git-rev-list -n1 --header b14e2494b8a70737066f4ade4df1b5559e81b44b
b14e2494b8a70737066f4ade4df1b5559e81b44b
tree 1baa1f8405d1fef90fe95f2477133a69adec288b
parent 8158d510c641e2354cf24a10bc3e994c7a1e3125
author Junio C Hamano [off-list ref] 1137562948 -0800
committer Junio C Hamano [off-list ref] 1137562948 -0800

    TODO updates 2006-01-17.

    Signed-off-by: Junio C Hamano [off-list ref]


Is it possible to get branch name from a revision sha?
Something like

$ git branch b14e2494b8a70737066f4ade4df1b5559e81b44b
todo

I need this to correctly annotate files not in HEAD tree. Currently qgit runs
git-rev-list --header --topo-order --parents --remove-empty HEAD -- <path>

to get a file history. But this fails if <path> is not found in HEAD. The right
command to run in our case should be:
git-rev-list --header --topo-order --parents --remove-empty todo -- <path>

So I need to get 'todo' branch name from a given revision sha's.

BTW also git blame fails (gracefully) if revision is not in HEAD:

$ git blame b14e2494b8a70737066f4ade4df1b5559e81b44b
b14e2494b8a70737066f4ade4df1b5559e81b44b not found in HEAD


Thanks
Marco