We need to make wait before creating the tag and after delete old tag.
It is required for case when source repository is synced between several instances and access to it is determined by geographical location, like the SVN repository at the Apache Software Foundation.

Note: the similar problem had maven-release-plugin. Their solution is new parameter waitBeforeTagging -> http://maven.apache.org/maven-release/maven-release-plugin/prepare-mojo.html#waitBeforeTagging