GRE tunnel public IP in virtual machine - Traceroute showing full route

[harmonyp]

`88.198.49.xxx` = Hetzner (will run virtual machines on this)

`141.94.176.xxx` = OVH (contains block below)

`164.132.xxx.0/28` = IP block to use on Hetzner as virtual machines

To get GRE set up I ran the following:

OVH:

 ip tunnel add gre1 mode gre remote 88.198.49.xxx local 141.94.176.xxx ttl 255
    ip link set gre1 up
    ip route add 164.132.xxx.0/28 dev gre1
    iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

Hetzner:

ip tunnel add gre1 mode gre remote 141.94.176.xxx local 88.198.49.xxx ttl 255
    ip link set gre1 up
    ip rule add from 164.132.xxx.0/28 table 666
    ip route add default dev gre1 table 666
    ip route add 164.132.xxx.0/28 dev vmbr0 table 666
    iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

/etc/network/interfaces (Hetzner)

auto vmbr0
    iface vmbr0 inet static
            address 164.132.xxx.1/28
            bridge-ports none
            bridge-stp off
            bridge-fd 0

When I traceroute 164.132.xxx.1 it works great doesn't show Hetzner IP

7     1 ms     1 ms     1 ms  10.95.34.50
      8     2 ms     2 ms     2 ms  10.73.1.135
      9     2 ms     2 ms     2 ms  10.72.66.67
     10     2 ms     2 ms     2 ms  10.164.42.155
     11     1 ms     1 ms     1 ms  xxxxxx [141.94.176.xxx]
     12    17 ms    17 ms    17 ms  xxxxxx [164.132.xxx.1]

However when I traceroute the virtual machine using 164.132.xxx.2 I get the following result

7     1 ms     1 ms     1 ms  10.95.34.32
      8     2 ms     2 ms     2 ms  10.73.1.45
      9     2 ms     2 ms     2 ms  10.72.66.67
     10     2 ms     2 ms     1 ms  10.164.42.163
     11     1 ms     1 ms     1 ms  xxxxxx [141.94.176.xxx]
     12    14 ms    14 ms    14 ms  xxxxxx [88.198.49.xxx]
     13    15 ms    15 ms    15 ms  xxxxxx [164.132.xxx.2]

How can I hide it so that 88.198.49.xxx is not shown? I believe this can be done with NAT but I do not want to use a NAT address as the virtual machines address. I want to keep the config as it is below for virtual machines if possible.

IP: 164.132.xxx.2/28
    Gateway: 164.132.xxx.1