[INFO] cloning repository https://github.com/gregfolker/rust-tests
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gregfolker/rust-tests" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregfolker%2Frust-tests", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregfolker%2Frust-tests'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9bd084bd9ee14912ec94aadd3bb9a088898b6b1f
[INFO] checking gregfolker/rust-tests against master#e3e432d4d65a55e6db167598e96db2bcb163e316 for pr-140313
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgregfolker%2Frust-tests" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-2-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0'


failed to checkout https://github.com/gregfolker/rust-tests

Caused by:
    command failed: exit status: 128