$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtcharts.git /var/lib/mock/f39-build-1621493-38723/root/chroot_tmpdir/scmroot/qt5-qtcharts
Cloning into '/var/lib/mock/f39-build-1621493-38723/root/chroot_tmpdir/scmroot/qt5-qtcharts'...
$ git fetch origin afce16a7c7d0b10b847c65ca7ec28c8823ecafa2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtcharts
 * [new ref]         afce16a7c7d0b10b847c65ca7ec28c8823ecafa2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afce16a 5.15.11