[INFO] cloning repository https://github.com/sunginHwang/study-rust-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sunginHwang/study-rust-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsunginHwang%2Fstudy-rust-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsunginHwang%2Fstudy-rust-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14b02f9168cd2bab995dd524b419d76c8dabeaf2
[INFO] checking sunginHwang/study-rust-lang against master#068609ce766e55d2e7371cd2a86143a6d7e8e2e4 for pr-138952
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsunginHwang%2Fstudy-rust-lang" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device


failed to checkout https://github.com/sunginHwang/study-rust-lang

Caused by:
    command failed: exit status: 1