From Fedora Project Wiki

Fedora 20

Use Case No. seed packages
Minimal chroot 15 glibc, bash
Minimal chroot + passwd 66 glibc, passwd
Container with systemd 89 glibc, passwd, systemd
Minimal bootable system 127 glibc, passwd, systemd, dracut, kernel, rpm, yum
Mock 225 mock, fedora-packager