# git rev-parse -q --verify 9618fe7fb9f750d490ad48a91546ed1a9c5745f3^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-stable-rc.git linux-4.20.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 9618fe7fb9f750d490ad48a91546ed1a9c5745f3^{commit}
9618fe7fb9f750d490ad48a91546ed1a9c5745f3
# git checkout -q -f -B kisskb 9618fe7fb9f750d490ad48a91546ed1a9c5745f3
# git clean -qxdf
# < git log -1
# commit 9618fe7fb9f750d490ad48a91546ed1a9c5745f3
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Thu Jan 10 21:06:33 2019 +0100
# 
#     Linux 4.20.2-rc1
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 9618fe7fb9f750d490ad48a91546ed1a9c5745f3
# < make -s -j 10 ARCH=arm64 O=/kisskb/build/stable-rc-4.20_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  defconfig
# make -s -j 10 ARCH=arm64 O=/kisskb/build/stable-rc-4.20_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:40: LSE atomics not supported by binutils
Completed OK
# rm -rf /kisskb/build/stable-rc-4.20_arm64-defconfig_arm64-gcc5.4
# Build took: 0:08:25.579503