You can automatically deploy a software release while deploying the webrunner itself, using the paramater XML.
To do this, you only need to pass as a parameter named "slapos-software" : "AAA/BBB", where AAA is the folder of slapos.git where is located your BBB software.
For example, to deploy the hello-world software, you need to pass : software/helloworld
This is possible because the slapos.git is automatically downloaded when the webrunner is deployed.
It is also possible to download you own git repository, by providing the url in the "slapos-repository" parameter.
Last but not least, it is also possible to switch the branch with the parameter "slapos-reference" (by default pointing on master)