$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtcharts.git /var/lib/mock/f42-build-side-1-3536474-46558/root/chroot_tmpdir/scmroot/qt6-qtcharts
Cloning into '/var/lib/mock/f42-build-side-1-3536474-46558/root/chroot_tmpdir/scmroot/qt6-qtcharts'...
$ git fetch origin a7fdd3ed9052f25a2ccad0c192a60191877992ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtcharts
 * [new ref]         a7fdd3ed9052f25a2ccad0c192a60191877992ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7fdd3e 6.9.1