$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtdeclarative.git /var/lib/mock/f40-build-785517-133985/root/chroot_tmpdir/scmroot/qt6-qtdeclarative
Cloning into '/var/lib/mock/f40-build-785517-133985/root/chroot_tmpdir/scmroot/qt6-qtdeclarative'...
$ git fetch origin 55e6bd582c715b13e96dba471493b9ff3b94001d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtdeclarative
 * [new ref]         55e6bd582c715b13e96dba471493b9ff3b94001d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55e6bd5 6.6.2