$ git clone -n https://src.fedoraproject.org/rpms/itinerary.git /var/lib/mock/f39-build-1745910-41407/root/chroot_tmpdir/scmroot/itinerary
Cloning into '/var/lib/mock/f39-build-1745910-41407/root/chroot_tmpdir/scmroot/itinerary'...
$ git fetch origin ae997777514535916a63056440a7d5b5b1de05eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/itinerary
 * [new ref]         ae997777514535916a63056440a7d5b5b1de05eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae99777 fix: rebuild