[INFO] cloning repository https://github.com/rezamt/substrate-kitties
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rezamt/substrate-kitties" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frezamt%2Fsubstrate-kitties", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frezamt%2Fsubstrate-kitties'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 285fc4dd7cecd473a814a5326e15df17a69a9c0e
[INFO] checking rezamt/substrate-kitties against master#ba412a6e70ac84641be7764d088acabd0eb3fa39 for pr-145457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frezamt%2Fsubstrate-kitties" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-6-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0'


failed to checkout https://github.com/rezamt/substrate-kitties

Caused by:
    command failed: exit status: 128