$ git clone -n https://src.fedoraproject.org/rpms/xfdesktop.git /var/lib/mock/f41-build-side-1-2826644-33435/root/chroot_tmpdir/scmroot/xfdesktop
Cloning into '/var/lib/mock/f41-build-side-1-2826644-33435/root/chroot_tmpdir/scmroot/xfdesktop'...
$ git fetch origin 4e7b0ad87eb5ed99e37c81841f084b0c8fda7f71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfdesktop
 * [new ref]         4e7b0ad87eb5ed99e37c81841f084b0c8fda7f71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e7b0ad convert GPLv2+ license to SPDX