CI flake: Build smoketests (Linux) #6115

Detected by CI Gremlin after a failed GitHub Actions attempt succeeded on rerun.

Tests:

• Build smoketests (Linux)

Error:
fatal: couldn't find remote ref refs/heads/gh-readonly-queue/master/pr-6109-f6a431d0759ce4137a844258e951abc8e64d0987
The process '/usr/bin/git' failed with exit code 128

Failed job runs:

• https://github.com/clockworklabs/SpacetimeDB/actions/runs/37827617459/job/113489635750 (Build smoketests (Linux), attempt 1 -> 2)

Timeout detection:

• none

Context:

• none