[INFO] cloning repository https://github.com/tronje/git-prompt-helper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tronje/git-prompt-helper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftronje%2Fgit-prompt-helper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftronje%2Fgit-prompt-helper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c7f00c93e33f178a0abc409ae61e7e5b33afd2e3
[INFO] checking tronje/git-prompt-helper against master#8365fcb2b840c95eeb0bc377af8bd498fad22245 for pr-145604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftronje%2Fgit-prompt-helper" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-1-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0'


failed to checkout https://github.com/tronje/git-prompt-helper

Caused by:
    command failed: exit status: 128