There is a new plugin overlayfs. This plugin implements mock's snapshot functionality using overlayfs. From a user perspective, it works similar to LVM plugin, but unlike LVM plugin, it only needs a directory (not a volume group) for its data (snapshots).
Previously a bind_mount plugin allowed to mount just a directory. Now, you can bind mount even a single file.
Previously a chroot_scan allowed retrieving artifacts from chroot where build started. Now, it can extract objects even from chroot which failed to initialize.
Change sign plugin to sign only built RPMs and not every file in results directory #1217495