$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtmqtt.git /var/lib/mock/f40-build-1465761-23665/root/chroot_tmpdir/scmroot/qt6-qtmqtt
Cloning into '/var/lib/mock/f40-build-1465761-23665/root/chroot_tmpdir/scmroot/qt6-qtmqtt'...
$ git fetch origin 1ae246f4087d1c543d3e0967745c83a9e971bb99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtmqtt
 * [new ref]         1ae246f4087d1c543d3e0967745c83a9e971bb99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ae246f 6.7.2