tidy: Simplify sourcing external repo

[KSkwarczynski]

Pull request description

tl:dr now if you source MaCh3 it will also source NuOscillator

Changes or fixes

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Memory and CPU Usage Summary

### Memory and CPU Usage Summary

| Metric  |     Mean    |      Max    |
|---------|-------------|-------------|
| **RAM** |   315.27 MB |   315.99 MB |
| **CPU** |    96.81 %  |   108.50 %  |

Memory Usage Plot

• Job Summary Link

You can view the memory usage plot directly in the job summary from the link above.