There is an updated pull request by bvdeenen against master on the void-packages repository

https://github.com/bvdeenen/void-packages master
https://github.com/void-linux/void-packages/pull/24881

owncloudclient: update to 2.6.3
The installed client works fine on my desktop. No longer nags about updates being available

A patch file from https://github.com/void-linux/void-packages/pull/24881.patch is attached