Update the checkout for the gtm-session-fetcher submodule.
Update the checkout for the gtm-session-fetcher submodule.

This doesn't impact CocoaPods, just changes what a checkout using modules would
get (if they don't explicitly update the modules themselves).

google/google-api-objectivec-client-for-rest,google/google-api-objectivec-client-for-rest,google/google-api-objectivec-client-for-rest,google/google-api-objectivec-client-for-rest,google/google-api-objectivec-client-for-rest