New in version 3.4.
Specify the CTest ChangeId setting in a ctest(1) dashboard client script.
This setting allows CTest to pass arbitrary information about this build up to CDash. One use of this feature is to allow CDash to post comments on your pull request if anything goes wrong with your build.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.19/variable/CTEST_CHANGE_ID.html