$ git clone -n https://src.fedoraproject.org/rpms/cinnamon.git /var/lib/mock/f42-build-59113616-6571176/root/chroot_tmpdir/scmroot/cinnamon
Cloning into '/var/lib/mock/f42-build-59113616-6571176/root/chroot_tmpdir/scmroot/cinnamon'...
$ git fetch origin 487314c7b16508a3331b80a534e65ea7bf8b4f37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cinnamon
 * [new ref]         487314c7b16508a3331b80a534e65ea7bf8b4f37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 487314c Update to 6.4.9