$ git clone -n https://src.fedoraproject.org/rpms/kjots.git /var/lib/mock/f41-build-854528-166886/root/chroot_tmpdir/scmroot/kjots
Cloning into '/var/lib/mock/f41-build-854528-166886/root/chroot_tmpdir/scmroot/kjots'...
$ git fetch origin 5453c09ebe023a57b495c9bdb68958ec3edde372:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kjots
 * [new ref]         5453c09ebe023a57b495c9bdb68958ec3edde372 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5453c09 6.0.0