Build Number needs to be inserted into the build process so people can know which version they have

I found a few issues, and developers asked for what version I am using. In the response it was discovered there is no way to grab the "version" of what was built. It would be great to inject a build time, and the version of the current git repo in some file somewhere. Might it be a good idea to grab and label all of the projects that make up the release. Support might want this information also.