Failed to execute git checkout '85c367998e9f87ae5cd3cb67dc95383a6da2b4ef' -- && git reset --hard '85c367998e9f87ae5cd3cb67dc95383a6da2b4ef' -- fatal: reference is not a tree: 85c367998e9f87ae5cd3cb67dc95383a6da2b4ef It looks like the commit hash is not available in the repository, maybe the commit was removed from the branch? Run "composer update wporg/wporg-mu-plugins" to resolve this.