Right version to modify kernel to be compatible with upstream

[fodiator]

see here for an example:

From snapshot to stable release (22.03)

Also did this, had some minor changes as compared to the reference you shared: git clone https://git.openwrt.org/openwrt/openwrt.git cd openwrt git fetch -t git checkout v22.03.0 wget https://downloads.openwrt.org/releases/22.03.0/targets/ath79/generic/config.buildinfo -O .config ./scripts/feeds update -a && ./scripts/feeds install -a make defconfig make target/linux/{clean,compile} find build_dir/ -name .vermagic -exec cat {} \;