$ git clone -n https://src.fedoraproject.org/rpms/kf6-kxmlgui.git /var/lib/mock/f41-build-side-1-3050561-37990/root/chroot_tmpdir/scmroot/kf6-kxmlgui
Cloning into '/var/lib/mock/f41-build-side-1-3050561-37990/root/chroot_tmpdir/scmroot/kf6-kxmlgui'...
$ git fetch origin 997c2e407ae47d4628a67776e885db01bd033e1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kxmlgui
 * [new ref]         997c2e407ae47d4628a67776e885db01bd033e1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 997c2e4 Rebuild (qt6)