$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtquickcontrols.git /var/lib/mock/f45-build-34045-676/root/chroot_tmpdir/scmroot/qt5-qtquickcontrols
Cloning into '/var/lib/mock/f45-build-34045-676/root/chroot_tmpdir/scmroot/qt5-qtquickcontrols'...
$ git fetch origin 15a834be79f7e442e94244b28bcb6d978d323c2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtquickcontrols
 * [new ref]         15a834be79f7e442e94244b28bcb6d978d323c2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15a834b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild