[INFO] cloning repository https://github.com/sinotca529/mdbook-sinotca-flavord
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sinotca529/mdbook-sinotca-flavord" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinotca529%2Fmdbook-sinotca-flavord", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinotca529%2Fmdbook-sinotca-flavord'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a73258ac63281f51c0570986fa645cea69636e01
[INFO] checking sinotca529/mdbook-sinotca-flavord against master#32cd9114712a24010b0583624dc52ac302194128 for pr-143717
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinotca529%2Fmdbook-sinotca-flavord" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/main': couldn't write '/workspace/builds/worker-4-tc1/source/.git/refs/heads/main.lock'


failed to checkout https://github.com/sinotca529/mdbook-sinotca-flavord

Caused by:
    command failed: exit status: 128