I recommend Nextcloud instead of ownCloud due to Nextcloud's community-driven approach (priority on stability and compatibility with other products rather than buzzword features).
Tested on Fedora 25:
owncloud client (below) as per https://software.opensuse.org/download/package?project=isv:ownCloud:desktop&package=owncloud-client (package in fedora/rpmfusion didn't work--client didn't open after successful config--one below worked and picked up that saved login instantly)
sudo dnf config-manager --add-repo http://download.opensuse.org/repositories/isv:ownCloud:desktop/Fedora_25/isv:ownCloud:desktop.repo
sudo dnf install owncloud-client