$ git clone -n https://src.fedoraproject.org/rpms/qt6-doc.git /var/lib/mock/f45-build-34089-677/root/chroot_tmpdir/scmroot/qt6-doc
Cloning into '/var/lib/mock/f45-build-34089-677/root/chroot_tmpdir/scmroot/qt6-doc'...
$ git fetch origin 319fe5e44d9be5469cc446bf6ec05c8f9f85166a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-doc
 * [new ref]         319fe5e44d9be5469cc446bf6ec05c8f9f85166a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 319fe5e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild