$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtserialport.git /var/lib/mock/f45-build-34072-677/root/chroot_tmpdir/scmroot/qt5-qtserialport
Cloning into '/var/lib/mock/f45-build-34072-677/root/chroot_tmpdir/scmroot/qt5-qtserialport'...
$ git fetch origin 4b55fb836a1ddd0fba9e917dada12d32378459aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtserialport
 * [new ref]         4b55fb836a1ddd0fba9e917dada12d32378459aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b55fb8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild