The //build/fuchsia/cipd target generates a number of YAML files that are used to produce archives that are uploaded to CIPD. The generated YAML files are stored in the output directory under the path gen/build/fuchsia/cipd/.
The most recent package can be discovered by searching for the “canary” ref:
$ cipd describe chromium/fuchsia/$PACKAGE_NAME-$TARGET_ARCH -version canary