To upgrade your FC6 ARM root filesystem to Rawhide, you will first have to tell yum the location of the Rawhide package repository. This is done by dropping the appropriate repository configuration file into /etc/yum.repos.d/. The Rawhide yum repository configuration file is available here .
If you are running a prebuilt FC6 ARM root filesystem from the Fedora ARM mirror site, run the following commands:
yum install wget (if not installed yet) wget -O /etc/yum.repos.d/fedora-arm.repo http://ftp.linux.org.uk/pub/linux/arm/fedora/fedora-arm-devel.repo
Then, to upgrade to Rawhide:
yum update
Finally, remove the additional repo config files that were installed during the upgrade of yum:
find /etc/yum.repos.d -type f | grep -v fedora-arm | xargs rm -f