This is quick & dirty fix to a problem with revision number and date when
building from the tarball. The tarballs don't have all the git info
required to recognise build type and set revision/date properly, so it
will be done "manually" using sed. That change doesn't affect anything
except fedora rpmbuild or COPR builds.
Signed-off-by: Przemo Firszt <przemo@firszt.eu>
9b063cd591