$ git clone -n https://src.fedoraproject.org/rpms/nextcloud-client.git /var/lib/mock/f39-build-1733970-41253/root/chroot_tmpdir/scmroot/nextcloud-client
Cloning into '/var/lib/mock/f39-build-1733970-41253/root/chroot_tmpdir/scmroot/nextcloud-client'...
$ git fetch origin 543122696980ad8fbced62aed236d3ceb9b24d39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nextcloud-client
 * [new ref]         543122696980ad8fbced62aed236d3ceb9b24d39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5431226 Update to v3.10.1