This doesn't work if hydra-queue-runner has no write access to the scm directory, and in any case races with the evaluator.
Y6W5NPPATMB5ZZQMMMTH7O3Y5HBLCO3ZYXGJIMWMBFLGC7JBEYJQC
NB2VOKIROXTIIIXKPHFHCGO236KPKXWYDSWUWVJF3XBRHRMUIQ4AC
JAH3UPWAVSHXIPNGL6PROQPZBYZHPJNFONWBDZX4HCX646USZXUQC
my $clonePath = $self->_cloneRepo($uri, $branch, $deepClone);
my $clonePath = getSCMCacheDir . "/git/" . sha256_hex($uri);