$ git clone -n https://src.fedoraproject.org/rpms/lxqt-about.git /var/lib/mock/f45-build-17822-504/root/chroot_tmpdir/scmroot/lxqt-about
Cloning into '/var/lib/mock/f45-build-17822-504/root/chroot_tmpdir/scmroot/lxqt-about'...
$ git fetch origin 15559b68715e92353aee5ca6ec0ff1d9b450ee2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxqt-about
 * [new ref]         15559b68715e92353aee5ca6ec0ff1d9b450ee2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15559b6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild