Comment # 1 on bug 1191229 from Takashi Iwai

Hrm, I failed to find where the problem lies.  Is the line 130 of
kernel-source.spec

%obsolete_rebuilds %name

??  This is expanded in rpm/kernel-spec-macros as

%define obsolete_rebuilds() %( %{verbose:set -x} \
        set -- $(echo %release | sed -rn
's/(.*\\.)([0-9]+)($|\\.[^.]*[^.0-9][^.]*$)/\\1 \\2 \\3/p') \
        if test -n "$2" && test "$2" -gt 99; then echo "warning: Rebuild
counter too high in %release" >&2; exit 0; fi \
        seq 1 $(($2-1)) | sed "s/.*/Obsoletes: %1 = %version-$1&$3/" \
)

In anyway adding Michal to Cc.