[INFO] cloning repository https://github.com/saxonparker/march_madness
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/saxonparker/march_madness" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaxonparker%2Fmarch_madness", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaxonparker%2Fmarch_madness'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a3670345d964ede1ef932ab52bcada823ac947f
[INFO] checking saxonparker/march_madness against master#19f42cb9bb65555e7d95dab7d17573ae6c5d634c for pr-139087
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaxonparker%2Fmarch_madness" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/trunk': couldn't write '/workspace/builds/worker-7-tc1/source/.git/refs/heads/trunk.lock'


failed to checkout https://github.com/saxonparker/march_madness

Caused by:
    command failed: exit status: 128