# git rev-parse -q --verify a1b8638ba1320e6684aa98233c15255eb803fac7^{commit}
a1b8638ba1320e6684aa98233c15255eb803fac7
already have revision, skipping fetch
# git checkout -q -f -B kisskb a1b8638ba1320e6684aa98233c15255eb803fac7
# git clean -qxdf
# < git log -1
# commit a1b8638ba1320e6684aa98233c15255eb803fac7
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Sep 27 14:38:10 2020 -0700
# 
#     Linux 5.9-rc7
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 a1b8638ba1320e6684aa98233c15255eb803fac7
# < make -s -j 8 ARCH=arm O=/kisskb/build/linus_davinci_all_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  davinci_all_defconfig
# < make -s -j 8 ARCH=arm O=/kisskb/build/linus_davinci_all_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  help
# make -s -j 8 ARCH=arm O=/kisskb/build/linus_davinci_all_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  olddefconfig
# make -s -j 8 ARCH=arm O=/kisskb/build/linus_davinci_all_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  
Completed OK
# rm -rf /kisskb/build/linus_davinci_all_defconfig_arm-gcc4.9
# Build took: 0:02:57.806000