[INFO] cloning repository https://github.com/xavierxcn/simple-redis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xavierxcn/simple-redis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxavierxcn%2Fsimple-redis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxavierxcn%2Fsimple-redis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b837b79c8d7aa1fbff01d5a541df05f24a96884
[INFO] checking xavierxcn/simple-redis against master#419b3e2d3e350822550eee0e82eeded4d324d584 for pr-135536
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxavierxcn%2Fsimple-redis" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update the ref 'refs/heads/master': unable to create directory for '/workspace/builds/worker-6-tc1/source/.git/logs/refs/heads/master': No such file or directory


failed to checkout https://github.com/xavierxcn/simple-redis

Caused by:
    command failed: exit status: 128