GNUmakefile: $(revname): git-describe used w/o --long
GNUmakefile: $(revname): git-describe used w/o --long

git describe --long always appends distance from the nearest
ancestor tag and short sha1 of HEAD, while i want release
version strings to omit these things.

roman-neuhauser/git-mailz,roman-neuhauser/git-mailz