[INFO] cloning repository https://github.com/dpjungmin/experimental-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dpjungmin/experimental-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpjungmin%2Fexperimental-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpjungmin%2Fexperimental-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d7aaac43979f89865666243aa4103bc8b4a097a
[INFO] checking dpjungmin/experimental-rust against master#90384941aae4ea38de00e4702b50757e9b882a19 for pr-138340
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpjungmin%2Fexperimental-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-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-4-tc1/source/.git/refs/heads/main.lock'


failed to checkout https://github.com/dpjungmin/experimental-rust

Caused by:
    command failed: exit status: 128