The builder with the minimum supported git version is being added in issue #26653, and so far it seems all but these two tests are passing with it:

• cmd/go.TestScript/mod_invalid_version
  • Not sure offhand what's causing the failure.
• cmd/go/internal/vcweb/vcstest.TestScripts/git/invalid-version.txt
  • Might be due to a difference in git's default branch behavior; init.defaultBranch was added only in 2.28.0.

See its recent builds here: https://ci.chromium.org/ui/p/golang/g/port-linux-amd64/builders?q=-git2.24.0. (The passing results were before https://crrev.com/c/7694655 finished propagating, so it was still testing with git 2.39.2 at that time.)

Once these tests are fixed (and either backported or skipped on release-branches), the known issue can be removed from that builder.

CC @golang/command-line.