$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtserialbus.git /var/lib/mock/f41-build-811751-147521/root/chroot_tmpdir/scmroot/qt5-qtserialbus
Cloning into '/var/lib/mock/f41-build-811751-147521/root/chroot_tmpdir/scmroot/qt5-qtserialbus'...
$ git fetch origin 40e097eaccb42c0efb24af6b6b710d8736ef02e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtserialbus
 * [new ref]         40e097eaccb42c0efb24af6b6b710d8736ef02e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40e097e 5.15.14