[INFO] cloning repository https://github.com/x3ro/langjam0001
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/x3ro/langjam0001" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fx3ro%2Flangjam0001", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fx3ro%2Flangjam0001'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2c5671cfb890c6a9f568f620ad579018f9d480c4
[INFO] checking x3ro/langjam0001 against master#2a023bf80a6fbd6a06d5460a34eb247b986286ed for pr-143764
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fx3ro%2Flangjam0001" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/master': couldn't write '/workspace/builds/worker-0-tc1/source/.git/refs/heads/master.lock'


failed to checkout https://github.com/x3ro/langjam0001

Caused by:
    command failed: exit status: 128