Remove GIT_SHALLOW from CMakeLists.txt [skip-ci-changelog]

[ajschmidt8]

This PR removes GIT_SHALLOW (which is not compatible with commit hashes) from the cuco fetch function to prevent build errors from occurring. This is similar to Rick's fix in #1250, but now needs to be backported to 0.16 since Ops needs to re-release 0.16 and this issue is causing build errors.

This fix was confirmed locally.

As outlined in the CMake docs:

If GIT_SHALLOW is enabled then GIT_TAG works only with branch names and tags. A commit hash is not allowed.

[GPUtester]

Please update the changelog in order to start CI tests.

View the gpuCI docs here.

[mike-wendt]

rerun tests

[codecov-io]

Codecov Report

Merging #1261 (11c75af) into main (892a8e1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1261   +/-   ##
=======================================
  Coverage   56.59%   56.59%           
=======================================
  Files          62       62           
  Lines        2564     2564           
=======================================
  Hits         1451     1451           
  Misses       1113     1113           

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