Hackily work around sbt-git issue

[blast-hardcheese]

See sbt/sbt-git#164

Contributing to Twilio

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• I acknowledge that all my contributions will be made under the project's license.

[codecov]

Codecov Report

Merging #971 (81db0a4) into master (bfe9577) will decrease coverage by 0.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #971      +/-   ##
==========================================
- Coverage   82.26%   81.95%   -0.31%     
==========================================
  Files          73       73              
  Lines        5327     5327              
  Branches      145      145              
==========================================
- Hits         4382     4366      -16     
- Misses        945      961      +16     

Impacted Files	Coverage Δ
...o/guardrail/generators/Scala/AkkaHttpJackson.scala	0.00% <0.00%> (-100.00%)	⬇️
...io/guardrail/generators/Scala/AkkaHttpHelper.scala	63.63% <0.00%> (-9.10%)	⬇️
...guardrail/generators/Scala/AkkaHttpGenerator.scala	25.60% <0.00%> (-3.66%)	⬇️
...egen/src/main/scala/com/twilio/guardrail/CLI.scala	63.01% <0.00%> (-1.37%)	⬇️

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