$ git clone -n https://src.fedoraproject.org/rpms/kf5-kitinerary.git /var/lib/mock/f40-build-2241567-53664/root/chroot_tmpdir/scmroot/kf5-kitinerary
Cloning into '/var/lib/mock/f40-build-2241567-53664/root/chroot_tmpdir/scmroot/kf5-kitinerary'...
$ git fetch origin da90d554858c79bc6067e8c4ab4bb7a646a6d0e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kitinerary
 * [new ref]         da90d554858c79bc6067e8c4ab4bb7a646a6d0e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da90d55 KF6 Coinstallability