$ git clone -n https://src.fedoraproject.org/rpms/kf5-akonadi-server.git /var/lib/mock/f40-build-2185708-51289/root/chroot_tmpdir/scmroot/kf5-akonadi-server
Cloning into '/var/lib/mock/f40-build-2185708-51289/root/chroot_tmpdir/scmroot/kf5-akonadi-server'...
$ git fetch origin 43caf106be29bee42457256ec576411df7fb2626:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-akonadi-server
 * [new ref]         43caf106be29bee42457256ec576411df7fb2626 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43caf10 Rebuild (qt5)