SPDX: SPDX_DOWNLOAD_LOCATION default value is missing commit hash
Currently, when generating a SPDX file, the SPDX_DOWNLOAD_LOCATION will contain this for a module:
git+https://gitlab.kitware.com/vtk/vtk.git#/IO/PLY
It should contain:
git+https://gitlab.kitware.com/vtk/vtk.git@GIT_COMMIT_HASH#/IO/PLY
But VTKDetermineVersion.cmake does not provide it.