Which uboot version for building rockpi s image

Hi, I’m trying to build uboot from source however it looks like the latest official radxa releases are using a dirty version of uboot not associated with a specific git commit.

I’m starting at https://github.com/radxa-build/rock-pi-s/releases/latest and trying to get the uboot source used to make image rockpi-s-debian-buster-server-arm64-20220801-0112-gpt.img.xz

From there, I can then go to see rockpi-s-rk-ubootimg_2017.09-g1765d3147d-dirty_all.deb which should be the uboot in that image.

During boot, this is confirmed by the following print to the console:
U-Boot 2017.09-g1765d3147d-dirty (Apr 01 2022 - 09:59:44 +0800)

From the filename and boot message I can see this uboot is based on git version 1765d3147d but there are also local non-checked in changes.

This appears accurate, as If I then go to https://github.com/radxa/u-boot and checkout version 1765d3147d it doesn’t build. There are clearly local changes used to build this .deb.