$ git clone -n https://src.fedoraproject.org/rpms/arc-gui-clients.git /var/lib/mock/f40-build-2334932-59340/root/chroot_tmpdir/scmroot/arc-gui-clients
Cloning into '/var/lib/mock/f40-build-2334932-59340/root/chroot_tmpdir/scmroot/arc-gui-clients'...
$ git fetch origin 5025c307a563535c35216d2179299aba3a5d956f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arc-gui-clients
 * [new ref]         5025c307a563535c35216d2179299aba3a5d956f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5025c30 Update license tag