$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtwebengine.git /var/lib/mock/f40-build-786437-134291/root/chroot_tmpdir/scmroot/qt6-qtwebengine
Cloning into '/var/lib/mock/f40-build-786437-134291/root/chroot_tmpdir/scmroot/qt6-qtwebengine'...
$ git fetch origin bcb85e498b86d2d58b195df05199b2f1b2df8dca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtwebengine
 * [new ref]         bcb85e498b86d2d58b195df05199b2f1b2df8dca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcb85e4 6.6.2