$ git clone -n https://src.fedoraproject.org/rpms/clutter-gtk.git /var/lib/mock/f41-build-side-1-2633172-25899/root/chroot_tmpdir/scmroot/clutter-gtk
Cloning into '/var/lib/mock/f41-build-side-1-2633172-25899/root/chroot_tmpdir/scmroot/clutter-gtk'...
$ git fetch origin c3c794a2c3f36012c36b25b4c837f3e1c04fda70:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clutter-gtk
 * [new ref]         c3c794a2c3f36012c36b25b4c837f3e1c04fda70 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3c794a convert license to SPDX