Log rclone union upstreams

rclone v1.55.1
ubuntu 20.04 lts server
google cloud storage

[uniontest]
type = union
upstreams = /path/local remote:bucket
action_policy = all
create_policy = all
search_policy = ff

rclone copy union:VirtualBox-6.1.22-144080-Win.exe teste -vv

2021/06/18 17:21:55 DEBUG : rclone: Version "v1.55.1" starting with parameters ["rclone" "copy" "union:VirtualBox-6.1.22-144080-Win.exe" "teste" "--union-upstreams" "/path/local remote:bucket" "--config" "/etc/rclone.conf" "-vv"]
2021/06/18 17:25:01 DEBUG : Creating backend with remote "union:VirtualBox-6.1.22-144080-Win.exe"
2021/06/18 17:25:01 DEBUG : union: detected overridden config - adding "{WLL0N}" suffix to name
2021/06/18 17:25:01 DEBUG : Creating backend with remote "remote:bucket"
2021/06/18 17:25:01 DEBUG : Creating backend with remote "/local"
2021/06/18 17:25:01 DEBUG : Creating backend with remote "/local/VirtualBox-6.1.22-144080-Win.exe"
2021/06/18 17:25:01 DEBUG : Creating backend with remote "remote:bucket/VirtualBox-6.1.22-144080-Win.exe"
2021/06/18 17:25:01 DEBUG : fs cache: adding new entry for parent of "/local/VirtualBox-6.1.22-144080-Win.exe", "/local"
2021/06/18 17:25:02 DEBUG : fs cache: adding new entry for parent of "remote:bucket/VirtualBox-6.1.22-144080-Win.exe", "remote:bucket"
2021/06/18 17:25:02 DEBUG : union root 'VirtualBox-6.1.22-144080-Win.exe': actionPolicy = *policy.All, createPolicy = *policy.All, searchPolicy = *policy.FF
2021/06/18 17:25:02 DEBUG : fs cache: adding new entry for parent of "union:VirtualBox-6.1.22-144080-Win.exe", "union{WLL0N}:VirtualBox-6.1.22-144080-Win.exe"
2021/06/18 17:25:02 DEBUG : Creating backend with remote "teste"
2021/06/18 17:25:02 DEBUG : fs cache: renaming cache item "teste" to be canonical "/root/teste"
2021/06/18 17:25:02 DEBUG : VirtualBox-6.1.22-144080-Win.exe: Need to transfer - File not found at Destination
2021/06/18 17:25:03 DEBUG : VirtualBox-6.1.22-144080-Win.exe: MD5 = 8bb0171914d874ca1e5cb9e5236c9cf2 OK
2021/06/18 17:25:03 INFO : VirtualBox-6.1.22-144080-Win.exe: Copied (new)
2021/06/18 17:25:03 INFO :
Transferred: 103.106M / 103.106 MBytes, 100%, 100.782 MBytes/s, ETA 0s
Transferred: 1 / 1, 100%
Elapsed time: 2.1s
2021/06/18 17:25:03 DEBUG : 4 go routines active

how do I know if the copy is done from "/local" and not "remote:bucket"?
how could I log it?