$ git clone -n https://src.fedoraproject.org/rpms/qzxing.git /var/lib/mock/f45-build-34267-683/root/chroot_tmpdir/scmroot/qzxing
Cloning into '/var/lib/mock/f45-build-34267-683/root/chroot_tmpdir/scmroot/qzxing'...
$ git fetch origin d371107ece35c1eba104e68d78fcb87085e31808:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qzxing
 * [new ref]         d371107ece35c1eba104e68d78fcb87085e31808 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d371107 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild