The source project of this merge request has been removed.
Grub2 unsigned 10.0
grub2 and grub2-unsigned are distributed under the same package name, the only change is on the version as the unsigned variant tracks a newer versions, thus grub2 is not fetched accordingly.
The change/commit introducing FIXED_VER allows to set tracking a specific version on the helper, allowing to track a lower version that corresponds to the correct grub2 package.
$ apt-cache madison grub2|grep -v trisquel
grub2 | 2.04-1ubuntu26 | http://archive.ubuntu.com/ubuntu focal/main Sources
grub2 | 2.04-1ubuntu26.13 | http://archive.ubuntu.com/ubuntu focal-updates/main Sources
grub2-unsigned | 2.04-1ubuntu44.2 | http://archive.ubuntu.com/ubuntu focal-updates/main Sources
Fixing the above issue now leaves grub2-unsigned package that also exists unchanged, thus this requires its own helper that tracks a verbatim copy of grub2 one and it DATA folder, without the FIXED_VER variable of the helper.
apt-cache madison grub2-unsigned|grep -v trisquel
grub2-unsigned | 2.04-1ubuntu44.2 | http://archive.ubuntu.com/ubuntu focal-updates/main Sources
So for new changes on grub2, will require to apply those changes to grub2-unsigned and re-build.