$ git clone -n https://src.fedoraproject.org/rpms/zaf.git /var/lib/mock/f45-build-39307-733/root/chroot_tmpdir/scmroot/zaf
Cloning into '/var/lib/mock/f45-build-39307-733/root/chroot_tmpdir/scmroot/zaf'...
$ git fetch origin d073ed577e53c583bdb9725801b71d369bc84f59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zaf
 * [new ref]         d073ed577e53c583bdb9725801b71d369bc84f59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d073ed5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild