$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtwebengine.git /var/lib/mock/f40-build-754210-117592/root/chroot_tmpdir/scmroot/qt6-qtwebengine
Cloning into '/var/lib/mock/f40-build-754210-117592/root/chroot_tmpdir/scmroot/qt6-qtwebengine'...
$ git fetch origin e7a3b4daeb007ca3a281e62eb03ea9e1fb61fea9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtwebengine
 * [new ref]         e7a3b4daeb007ca3a281e62eb03ea9e1fb61fea9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7a3b4d 6.6.1