$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtserialport.git /var/lib/mock/f42-build-side-1-3539493-46565/root/chroot_tmpdir/scmroot/qt6-qtserialport
Cloning into '/var/lib/mock/f42-build-side-1-3539493-46565/root/chroot_tmpdir/scmroot/qt6-qtserialport'...
$ git fetch origin 468213e9313b6a230bfff980c1b74b194df16e7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtserialport
 * [new ref]         468213e9313b6a230bfff980c1b74b194df16e7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 468213e 6.9.1