$ git clone -n https://src.fedoraproject.org/rpms/nextcloud.git /var/lib/mock/f40-build-1464390-23610/root/chroot_tmpdir/scmroot/nextcloud
Cloning into '/var/lib/mock/f40-build-1464390-23610/root/chroot_tmpdir/scmroot/nextcloud'...
$ git fetch origin c993db454506b454c85e5d951b85c4fc96c00770:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nextcloud
 * [new ref]         c993db454506b454c85e5d951b85c4fc96c00770 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c993db4 update to 29.0.3 release