$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtmqtt.git /var/lib/mock/f41-build-861364-169705/root/chroot_tmpdir/scmroot/qt6-qtmqtt
Cloning into '/var/lib/mock/f41-build-861364-169705/root/chroot_tmpdir/scmroot/qt6-qtmqtt'...
$ git fetch origin ecfa51ea3ff9f0fcf341da14b39b9bea64afd7cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtmqtt
 * [new ref]         ecfa51ea3ff9f0fcf341da14b39b9bea64afd7cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ecfa51e 6.8.0