[INFO] updating cached repository https://github.com/paritytech/polkadot
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/paritytech/polkadot
[INFO] [stderr]  - [deleted]           (none)     -> andre/update-substrate-master
[INFO] [stderr]  - [deleted]           (none)     -> andre/v0.6.1
[INFO] [stderr]  - [deleted]           (none)     -> gav-parathreads
[INFO] [stderr]  + 979e1982...04c37c52 bkchr-cumulus-branch -> bkchr-cumulus-branch  (forced update)
[INFO] [stderr]  * [new branch]        ci-version-and-tags  -> ci-version-and-tags
[INFO] [stderr]    d517dbeb..31741171  master               -> master
[INFO] [stderr]    5020fa48..9c72bfdb  v0.6                 -> v0.6
[INFO] [stderr]  * [new tag]           v0.6.2               -> v0.6.2
[INFO] [stderr]  * [new tag]           v0.6.1               -> v0.6.1
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 317411718ce6450923aa2b8ef6ebae4eba9408e5
[ERROR] this task or one of its parent failed!
[ERROR] command `"/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.