# git rev-parse -q --verify 6a09e212b52e5edf398ca6296a183187d7343863^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-stable-rc.git linux-4.19.y
error: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify 6a09e212b52e5edf398ca6296a183187d7343863^{commit}
6a09e212b52e5edf398ca6296a183187d7343863
# git checkout -q -f -B kisskb 6a09e212b52e5edf398ca6296a183187d7343863
# git clean -qxdf
# < git log -1
# commit 6a09e212b52e5edf398ca6296a183187d7343863
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Tue Dec 11 16:16:41 2018 +0100
# 
#     Linux 4.19.9-rc1
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < git log --format=%s --max-count=1 6a09e212b52e5edf398ca6296a183187d7343863
# < make -s -j 80 ARCH=x86 O=/kisskb/build/stable-rc-4.19_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# make -s -j 80 ARCH=x86 O=/kisskb/build/stable-rc-4.19_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  
arch/x86/Makefile:227: *** You are building kernel with non-retpoline compiler, please update your compiler..  Stop.
make: *** [Makefile:146: sub-make] Error 2
Command 'make -s -j 80 ARCH=x86 O=/kisskb/build/stable-rc-4.19_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/stable-rc-4.19_x86_64_defconfig_x86_64
# Build took: 0:02:22.116439