El repositorio de maven de tejido genera gradaciones lentas

Después de actualizar desde el uso de Crashlytics maven repo al nuevo plugin de Fabric maven repo y gradle, mis compilaciones gradle se han vuelto increíblemente lentas.

El problema parece ser causado por el revent de Fabric maven devolviendo un error 401 no autorizado cuando gradle intenta resolver una dependencia:

Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/recyclerview-v7/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/appcompat-v7/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/support-v4/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/google/android/gms/play-services/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/support-annotations/21.0.2/support-annotations-21.0.2.pom] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/mediarouter-v7/19.0.1/mediarouter-v7-19.0.1.pom] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/support-annotations/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/recyclerview-v7/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/appcompat-v7/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/android/support/support-v4/maven-metadata.xml] Failed to get resource: GET. [HTTP HTTP/1.1 401 Unauthorized: https://maven.fabric.io/repo/com/google/android/gms/play-services/maven-metadata.xml] 

El viejo Crashlytics maven repo no devolvió estos resultados.

¿Alguien ha tenido un error similar, o ha encontrado una solución?

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