$ git clone -n https://src.fedoraproject.org/rpms/qucs-s.git /var/lib/mock/f45-build-34226-682/root/chroot_tmpdir/scmroot/qucs-s
Cloning into '/var/lib/mock/f45-build-34226-682/root/chroot_tmpdir/scmroot/qucs-s'...
$ git fetch origin c7b21c913fab312702024754bdfb760946589724:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qucs-s
 * [new ref]         c7b21c913fab312702024754bdfb760946589724 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7b21c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild