[INFO] cloning repository https://github.com/kregerl/Shawl-v2.0
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kregerl/Shawl-v2.0" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkregerl%2FShawl-v2.0", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkregerl%2FShawl-v2.0'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1419e39940eab49b8b3ef40422c4aff7de743216
[INFO] checking kregerl/Shawl-v2.0 against master#ecb170afc878648c3ae355dbd596c8e4b6f7ebdc for pr-139022
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkregerl%2FShawl-v2.0" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/master': couldn't write '/workspace/builds/worker-1-tc1/source/.git/refs/heads/master.lock'


failed to checkout https://github.com/kregerl/Shawl-v2.0

Caused by:
    command failed: exit status: 128