[Localization] Error when updating files from git in Pootle

[Alexander Todorov]

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Hello,
I get this error:
git error running 'git show HEAD:po/bg.po': fatal: ambiguous argument
'HEAD:po/bg.po': unknown revision or path not in the working tree. Use '--' to
separate paths from revisions

This is for all TamTam files and E-Toys for Bulgarian language.

Steps to reproduce:
* try to update the file from git (I regularly update files so translators can
pick up new strings)

Please help.

Thanks,
Alexander.
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