$ git clone -n https://src.fedoraproject.org/rpms/thunar-vcs-plugin.git /var/lib/mock/f41-build-side-1-2670607-29060/root/chroot_tmpdir/scmroot/thunar-vcs-plugin
Cloning into '/var/lib/mock/f41-build-side-1-2670607-29060/root/chroot_tmpdir/scmroot/thunar-vcs-plugin'...
$ git fetch origin 7dc6ed890c648d5cbeb44a23c1ed5f061baecdc8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/thunar-vcs-plugin
 * [new ref]         7dc6ed890c648d5cbeb44a23c1ed5f061baecdc8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7dc6ed8 convert GPLv2+ license to SPDX