[INFO] cloning repository https://github.com/sogebu/blackhole-ray-marching
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sogebu/blackhole-ray-marching" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsogebu%2Fblackhole-ray-marching", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsogebu%2Fblackhole-ray-marching'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9ff651abc3724d146bacf62bcb0c41cccb9f4581
[INFO] checking sogebu/blackhole-ray-marching against master#068609ce766e55d2e7371cd2a86143a6d7e8e2e4 for pr-138952
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsogebu%2Fblackhole-ray-marching" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/main': couldn't write '/workspace/builds/worker-5-tc1/source/.git/refs/heads/main.lock'


failed to checkout https://github.com/sogebu/blackhole-ray-marching

Caused by:
    command failed: exit status: 128