make test fails tests 17 and 18 (fetch/push special filenames)

[anntzer]

git-hg-git master and 0.3, git 2.7.2, hg 3.7.1.

[anntzer]

FWIW, this seems related to the use of the C.UTF-8 locale, which is present on e.g. Debian but not on Arch. Not sure there's much to do about it in a portable manner until C.UTF-8 becomes part of (upstream) glibc. Feel free to close.