$ git clone -n https://src.fedoraproject.org/rpms/xfce4-dev-tools.git /var/lib/mock/f41-build-side-1-2763328-31920/root/chroot_tmpdir/scmroot/xfce4-dev-tools
Cloning into '/var/lib/mock/f41-build-side-1-2763328-31920/root/chroot_tmpdir/scmroot/xfce4-dev-tools'...
$ git fetch origin 0c15aa49d6668dd071a80dffdb54ca6373241a4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-dev-tools
 * [new ref]         0c15aa49d6668dd071a80dffdb54ca6373241a4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c15aa4 convert GPLv2+ license to SPDX