The behavior looks correct when setting the --refresh-dependencies flag, I think I will use that as a workaround for now. Here is the log output. Note that in this case, the previous build had used SNAPSHOT 18, and it correctly picks up the new build 19:
20:25:43.938 [DEBUG] [io.spring.gradle.dependencymanagement.DependencyManagementContainer] Found managed version '1.0.0-SNAPSHOT' for dependency '-group-:common-lib' in dependency management for configuration 'compileClasspath'
20:25:43.939 [INFO] [io.spring.gradle.dependencymanagement.VersionConfiguringAction] Using version '1.0.0-SNAPSHOT' for dependency '-group-:common-lib:1.0.0-SNAPSHOT'
20:25:43.942 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder] Selecting new module version -group-:common-lib:1.0.0-SNAPSHOT
20:25:43.942 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver] Attempting to resolve component for -group-:common-lib:1.0.0-SNAPSHOT using repositories [maven, MavenRepo]
20:25:43.947 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository] Cached meta-data for changing module is expired: will perform fresh resolve of '-group-:common-lib:1.0.0-SNAPSHOT' in 'maven'
20:25:43.948 [DEBUG] [org.gradle.internal.resource.transport.http.HttpResourceAccessor] Constructing external resource: https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/maven-metadata.xml
20:25:43.948 [DEBUG] [org.gradle.internal.resource.transport.http.HttpClientHelper] Performing HTTP GET: https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/maven-metadata.xml
20:25:43.968 [DEBUG] [org.apache.http.impl.execchain.MainClientExec] Executing request GET /artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/maven-metadata.xml HTTP/1.1
20:25:43.975 [DEBUG] [org.gradle.api.internal.artifacts.repositories.resolver.MavenMetadataLoader] parsing maven-metadata: https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/maven-metadata.xml
20:25:43.977 [DEBUG] [org.gradle.internal.resource.transport.http.HttpResponseResource] Attempting to download resource https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/maven-metadata.xml.
20:25:44.004 [DEBUG] [org.gradle.api.internal.artifacts.repositories.resolver.DefaultExternalResourceArtifactResolver] Loading https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/common-lib-1.0.0-20160812.202450-19.pom
20:25:44.004 [DEBUG] [org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor] Constructing external resource: https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/common-lib-1.0.0-20160812.202450-19.pom
20:25:44.007 [DEBUG] [org.gradle.internal.resource.transport.http.HttpResourceAccessor] Constructing external resource metadata: https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/common-lib-1.0.0-20160812.202450-19.pom
20:25:44.007 [DEBUG] [org.gradle.internal.resource.transport.http.HttpClientHelper] Performing HTTP HEAD: https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/common-lib-1.0.0-20160812.202450-19.pom
20:25:44.009 [DEBUG] [org.apache.http.impl.execchain.MainClientExec] Executing request HEAD /artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/common-lib-1.0.0-20160812.202450-19.pom HTTP/1.1
20:25:44.013 [INFO] [org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor] Found locally available resource with matching checksum: [https://artifactory/artifactory/-repo/-group-/common-lib/1.0.0-SNAPSHOT/common-lib-1.0.0-20160812.202450-19.pom, s/modules-2/files-2.1/-group-/common-lib/1.0.0-SNAPSHOT/8adcb351763e40d25f435b5b91084c0444126a9/common-lib-1.0.0-SNAPSHOT.pom]
20:25:44.023 [DEBUG] [org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver] Metadata file found for module '-group-:common-lib:1.0.0-SNAPSHOT:20160812.202450-19' in repository 'maven'.
20:25:44.023 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.modulecache.DefaultModuleMetaDataCache] Recording module descriptor in cache: -group-#common-lib;1.0.0-SNAPSHOT [changing = true]
20:25:44.024 [DEBUG] [org.gradle.api.internal.file.delete.Deleter] Deleting /home/builder/.gradle/caches/modules-2/metadata-2.16/descriptors/-group-/common-lib/1.0.0-SNAPSHOT/646136fc11ce1aa944571ea53e487837/ivy.xml
20:25:44.025 [DEBUG] [org.gradle.api.internal.file.delete.Deleter] Deleting /home/builder/.gradle/caches/modules-2/metadata-2.16/descriptors/-group-/common-lib/1.0.0-SNAPSHOT/646136fc11ce1aa944571ea53e487837/ivy.xml.fslck
20:25:44.026 [DEBUG] [org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver] Using -group-:common-lib:1.0.0-SNAPSHOT from Maven repository 'maven'