$ git clone -n https://src.fedoraproject.org/rpms/kf5-akonadi-server.git /var/lib/mock/f42-build-side-1-3580392-46823/root/chroot_tmpdir/scmroot/kf5-akonadi-server
Cloning into '/var/lib/mock/f42-build-side-1-3580392-46823/root/chroot_tmpdir/scmroot/kf5-akonadi-server'...
$ git fetch origin 44de3a8729fef9ab4923b64f21a536f0be7dbd1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-akonadi-server
 * [new ref]         44de3a8729fef9ab4923b64f21a536f0be7dbd1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 44de3a8 Rebuild (qt5)