Ubuntu used a patch for this, but it's just a work-around for now and multiple upstream's developers told me that is not the right approach to use. -- debbug#555134 ...
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ID Status▼ Resolution▲ Sev▲ Product Comp Assignee▲ Reporter Summary
29739 NEW --- nor Sisyphus tig vt imz tig is fooled by .git/.git/refs/ (via "git-ls-remote .git")

File a new bug in the "tig" component of the "Sisyphus" product