$ git clone -n https://src.fedoraproject.org/rpms/xfce4-settings.git /var/lib/mock/f42-build-3403083-45134/root/chroot_tmpdir/scmroot/xfce4-settings
Cloning into '/var/lib/mock/f42-build-3403083-45134/root/chroot_tmpdir/scmroot/xfce4-settings'...
$ git fetch origin 35960bc3bf0de02e09539ddd36d323831333e3fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-settings
 * [new ref]         35960bc3bf0de02e09539ddd36d323831333e3fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35960bc Update to v4.20.1