There are some builds pushed to fabric/crashlytics, but they hold one release version (no idea where taken from) with numerous build numbers. How to change/increment/sync the release version in fastlane?
Crashlytics pulls the version number from the Info.plist file in the IPA that fastlane uploads.
You can change the version number in Crashlytics by editing the Bundle Versions String, Short entry in your Info.plist file prior to building the application. This file is created automatically as part of any iOS application project.
You can also use the increment_version_number fastlane action to set it programmatically instead of doing it by hand.