Get them from the downloads.
See the release overviews containing the addressed issues:
About upgraded subprojects
On the release overviews you might notice a little star symbol next to some of the subproject builds contained in those releases. They mark subprojects that were also upgraded since the last version, so the issues that you find documented on those builds (just click the link on the version number) were also addressed in the respective release.
Normally you can identify those upgraded subprojects by their version number, which is always identical to the one of the OpenWGA release that the current version was initially added to. So OpenWGA admin client 6.2.4 is the version that was upgraded on and added to OpenWGA server 6.2.4.
But sometimes subproject versions originate from a different development stream than the current one. As you can see on 6.2.4 the OpenWGA Content Store Maintenance Plugin version 6.0.16 is also new in OpenWGA server 6.2.4. This is because it was initially added to OpenWGA Server 6.0.16 and then "merged up" into OpenWGA Server 6.2.4. This is not easy to track back just by the overview information.
Because of this the star symbol now helps you to easily identify those upgraded subprojects so you know about the complete set of addressed issues for a release.