http://jenkins.cyanogenmod.com/
You must be a member of the CyanogenMod organization, and your membership must be public at https://github.com/CyanogenMod
Jenkins will authorize using OAuth to GitHub.
Click the "android" job.
Configure what you want to build.
Build it. Note that regular builds (nightly/snap/whatever) can only
be produced by the automated processes. Manually triggered builds will
always be labeled as EXPERIMENTAL
This repository is preconfigured to use the git-review plugin. More information can be found at: https://pypi.python.org/pypi/git-review
Edit cm-build-targets and submit a change to gerrit for review. The syntax for that file is documented in its first few lines. You can upload your change to gerrit with commands like these:
git add cm-build-targets
git commit
git review
Once you have submitted your change add the group "Release" to the reviewers.