devel/git-cinnabar: unbreak fetch after da94d4ba3ca4

fetch: https://codeload.github.com/glandium/git-cinnabar/tar.gz/0.7.0-beta.1?dummy=/glandium-git-cinnabar-0.7.0-beta.1_GH0.tar.gz: Not Found

Reported by: cy
Tested by: diff -urN