$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtbase.git /var/lib/mock/f41-build-861315-169693/root/chroot_tmpdir/scmroot/qt6-qtbase
Cloning into '/var/lib/mock/f41-build-861315-169693/root/chroot_tmpdir/scmroot/qt6-qtbase'...
$ git fetch origin 23ff8b464c32216cf235134b5ee679b50d00f0e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtbase
 * [new ref]         23ff8b464c32216cf235134b5ee679b50d00f0e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23ff8b4 Merge branch 'rawhide' into f41