$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtserialbus.git /var/lib/mock/f40-build-2232354-53331/root/chroot_tmpdir/scmroot/qt5-qtserialbus
Cloning into '/var/lib/mock/f40-build-2232354-53331/root/chroot_tmpdir/scmroot/qt5-qtserialbus'...
$ git fetch origin 47840ccc39ae7c1c6311de1682eccc08728e1726:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtserialbus
 * [new ref]         47840ccc39ae7c1c6311de1682eccc08728e1726 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47840cc 5.15.12