$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtgrpc.git /var/lib/mock/f41-build-861370-169705/root/chroot_tmpdir/scmroot/qt6-qtgrpc
Cloning into '/var/lib/mock/f41-build-861370-169705/root/chroot_tmpdir/scmroot/qt6-qtgrpc'...
$ git fetch origin 3b2284370b6752be7ff431ed1afb248aba1df8dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtgrpc
 * [new ref]         3b2284370b6752be7ff431ed1afb248aba1df8dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b22843 6.8.0