Gerrit howto remove changes

Sometimes you want to delete a Gerrit change to make it invisible for everyone (for example when you did commit an unencrypted secret...). AFAIK this is only possible via the SQL interface which you can enter with

ssh <gerrit host>:29418 gerrit gsql

and issue a delete with:

update changes set status='d' where change_id='<change id>';

For more Gerrit hints check out the Gerrit Cheat Sheet