$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtcharts.git /var/lib/mock/f40-build-740239-109608/root/chroot_tmpdir/scmroot/qt6-qtcharts
Cloning into '/var/lib/mock/f40-build-740239-109608/root/chroot_tmpdir/scmroot/qt6-qtcharts'...
$ git fetch origin ae15be9ce043570f6a64361850a1c1b54eaf285a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtcharts
 * [new ref]         ae15be9ce043570f6a64361850a1c1b54eaf285a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae15be9 6.6.0