$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtserialbus.git /var/lib/mock/f42-flatpak-app-build-58978415-6569588/root/chroot_tmpdir/scmroot/qt6-qtserialbus
Cloning into '/var/lib/mock/f42-flatpak-app-build-58978415-6569588/root/chroot_tmpdir/scmroot/qt6-qtserialbus'...
$ git fetch origin 819d1c109d724e9f2df74a7f69708fc366c82829:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtserialbus
 * [new ref]         819d1c109d724e9f2df74a7f69708fc366c82829 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 819d1c1 6.9.0