In Gerrit there is an option to copy Change-Id, commit id and parrent commit id. But in new Gerrit UI, this option is missing completely. Change-Id can be found in the commit message, but parent id can not be found anywhere (T195278). And those simple copyable text fields from the old Gerrit UI are missing completely.
If I look into Gerrit 3.1.4, it contains copyable parent sha and commit sha, only Change-Id does not have this button. And missing Change-Id button issue has been closed as WontFix, so this is resolved as far as I can tell.