root@foreman01:/usr/share/foreman/config/hooks/host/managed# find . -name '0_log.sh' 
./after_destroy/0_log.sh
./destroy/0_log.sh

content of 0_log.sh:

#!/bin/bash

. $(dirname $0)/hook_functions.sh

# event name (create, before_destroy etc.)
# orchestration hooks must obey this to support rollbacks (create/update/destroy)
event=${HOOK_EVENT}

# to_s representation of the object, e.g. host's fqdn
object=${HOOK_OBJECT}

# Example of using hook_data to query the JSON representation of the object
# passed by foreman_hooks.  `cat $HOOK_OBJECT_FILE` to see the contents.
hostname=$(hook_data host.name)
ip=$(hook_data host.ip)
hostname2='www.redhat.com'
ipdns=`dig +short $hostname @foremandns`
ipdns2=`dig +short $hostname2 @8.8.8.8`

echo "$(date): received ${event} on ${object} on them hostname $hostname and ip $ip and ipdns $ipdns and ipdns2 $ipdns2" >> /tmp/hook.log

# exit code is important on orchestration tasks
exit 0

After deleting host the content of /tmp/hook.log shows:

Wed Mar  2 10:53:18 CET 2016: received after_destroy on tezt-hezt8.X.no on them hostname tezt-hezt8.X.no and ip  and ipdns  and ipdns2 ds-www.redhat.com.edgekey.net.
ds-www.redhat.com.edgekey.net.globalredir.akadns.net.
e3396.dscx.akamaiedge.net.
23.53.35.183
Wed Mar  2 10:53:22 CET 2016: received destroy on tezt-hezt8.X.no on them hostname tezt-hezt8.X.no and ip  and ipdns  and ipdns2 ds-www.redhat.com.edgekey.net.
ds-www.redhat.com.edgekey.net.globalredir.akadns.net.
e3396.dscx.akamaiedge.net.
23.53.35.183

Looks like dns records are deleted before 0_ ?