--help You already got it :)
+ --kill Instead of starting a build kill the one currently
+ running.
+
+ --shell Instead of starting a build start a root shell in
+ the build root.
+
--clean Delete old build root before initializing it
--no-init Skip initialization of build root and start with build
--no-checks Do not run post-build checks
+ --lint Run rpmlint after build.
+
+ --logfile logfile
+ Capture build output to logfile. Defaults to
+ .build.log in the build root for non-VM builds.
+
--repository PATH
Use package repository at PATH. Supported formats are
rpm-md and yast2.
--verify Run verify when initializing the build root
--extra-packs pack
+ -X pack
Also install package 'pack'
--root rootdir
List rpms that would be used to create a fresh build root.
Does not create the build root or perform a build.
+ --dist dist
+ Distribution to use
+
--with X
enable feature X for build
--define 'X Y'
define macro X with value Y
+ --release release
+ Override Release in spec file
+
+ --stage -bSTAGE
+ Set stage for rpmbuild. Defaults to -ba.
+
+ --target platform
+ Set target platform for rpmbuild
+
+ --jobs N Use N parallel processes during build.
+ Sets %jobs and %_smp_mflags macros and
+ defines the number of CPUs to use for
+ VMs.
+
--ccache
use ccache to speed up rebuilds
--vm-disk-filesystem TYPE
Defaults for automatic setup of VM root/swap files
+ --vm-memory SIZEINMB
+ Set amount of RAM for VMs
+
--vm-kernel FILE
--vm-initrd FILE
Kernel and initrd to use for VM (kvm and qemu only)