[INFO] cloning repository https://github.com/kdk8747/study_vulkano
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kdk8747/study_vulkano" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdk8747%2Fstudy_vulkano", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdk8747%2Fstudy_vulkano'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/kdk8747/study_vulkano
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kdk8747/study_vulkano" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdk8747%2Fstudy_vulkano", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdk8747%2Fstudy_vulkano'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 34c2df8f0925e29e22fbd235a4d97f892e64f3da
[INFO] checking kdk8747/study_vulkano against master#d93f678fa55842cccd2f091deccd93e9494b3764 for pr-138844
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdk8747%2Fstudy_vulkano" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device


failed to checkout https://github.com/kdk8747/study_vulkano

Caused by:
    command failed: exit status: 1