K_NOSETEXTRAVERSION="yes" K_NOUSEPR="yes" K_SECURITY_UNSUPPORTED="yes" -K_BASE_VER="4.0" +K_BASE_VER="4.1" ETYPE="sources" CKV="${PVR/-r/-git}" patch-4.2-rc*.xz is based on linux-4.1.tar.xz and not linux-4.0.tar.xz btw, Thank you for the version bump.
Jospezial, thanks for reporting. Fixed and committed. 19 Jul 2015; Mike Pagano <mpagano@gentoo.org> git-sources-4.2_rc2.ebuild: Bump KBASE_VER to 4.1 Bug #554702. Thanks to jospezial.