# git rev-parse -q --verify c3203bb03db01f205a909d5010782358bc92bc0a^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/stable linux-4.9.y
remote: error: refs/tags/v4.19.158 does not point to a valid object!        
remote: error: refs/tags/v5.4.78 does not point to a valid object!        
remote: error: refs/tags/v5.9.9 does not point to a valid object!        
warning: 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 c3203bb03db01f205a909d5010782358bc92bc0a^{commit}
c3203bb03db01f205a909d5010782358bc92bc0a
# git checkout -q -f -B kisskb c3203bb03db01f205a909d5010782358bc92bc0a
# git clean -qxdf
# < git log -1
# commit c3203bb03db01f205a909d5010782358bc92bc0a
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Wed Nov 18 18:26:32 2020 +0100
# 
#     Linux 4.9.244
#     
#     Tested-by: Jon Hunter <jonathanh@nvidia.com>
#     Tested-by: Shuah Khan <skhan@linuxfoundation.org>
#     Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
#     Reviewed-by: Guenter Roeck <linux@roeck-us.net>
#     Link: https://lore.kernel.org/r/20201117122109.116890262@linuxfoundation.org
#     Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-ld --version
# < git log --format=%s --max-count=1 c3203bb03db01f205a909d5010782358bc92bc0a
# < make -s -j 48 ARCH=s390 O=/kisskb/build/stable-4.9_s390-defconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  defconfig
# < make -s -j 48 ARCH=s390 O=/kisskb/build/stable-4.9_s390-defconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  help
# make -s -j 48 ARCH=s390 O=/kisskb/build/stable-4.9_s390-defconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  olddefconfig
# make -s -j 48 ARCH=s390 O=/kisskb/build/stable-4.9_s390-defconfig_s390x-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/s390-linux/bin/s390-linux-  
Completed OK
# rm -rf /kisskb/build/stable-4.9_s390-defconfig_s390x-gcc4.9
# Build took: 0:02:24.704458