$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtserialport.git /var/lib/mock/f40-build-2155759-50918/root/chroot_tmpdir/scmroot/qt6-qtserialport
Cloning into '/var/lib/mock/f40-build-2155759-50918/root/chroot_tmpdir/scmroot/qt6-qtserialport'...
$ git fetch origin fbb5b194af21fadbd12d2734fff4450b85471feb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtserialport
 * [new ref]         fbb5b194af21fadbd12d2734fff4450b85471feb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbb5b19 6.6.1