[INFO] cloning repository https://github.com/miguoliang/slack-off
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/miguoliang/slack-off" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiguoliang%2Fslack-off", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiguoliang%2Fslack-off'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cb6d09e181ad7de597a9dc1d281ca7b093198a1d
[INFO] checking miguoliang/slack-off against master#f5d3fe273b8b9e7125bf8856d44793b6cc4b6735 for pr-139587-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiguoliang%2Fslack-off" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-3-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0'


failed to checkout https://github.com/miguoliang/slack-off

Caused by:
    command failed: exit status: 128