# git rev-parse -q --verify 857962e4c7ee68cec7bbf720850c80d2ec7e5777^{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 857962e4c7ee68cec7bbf720850c80d2ec7e5777^{commit}
857962e4c7ee68cec7bbf720850c80d2ec7e5777
# git checkout -q -f -B kisskb 857962e4c7ee68cec7bbf720850c80d2ec7e5777
# git clean -qxdf
# < git log -1
# commit 857962e4c7ee68cec7bbf720850c80d2ec7e5777
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Mon Nov 19 17:25:59 2018 +0100
# 
#     Linux 4.19.3-rc1
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 857962e4c7ee68cec7bbf720850c80d2ec7e5777
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/stable-rc-4.19_powernv_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/stable-rc-4.19_powernv_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: modpost: Found 2 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
Completed OK
# rm -rf /kisskb/build/stable-rc-4.19_powernv_defconfig_ppc64le-gcc5
# Build took: 0:04:06.261739