$ git clone -n https://src.fedoraproject.org/rpms/sad.git /var/lib/mock/f45-build-46396-834/root/chroot_tmpdir/scmroot/sad
Cloning into '/var/lib/mock/f45-build-46396-834/root/chroot_tmpdir/scmroot/sad'...
$ git fetch origin b88b06f0b14fde0cbe79b93523bcfbe490df0215:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sad
 * [new ref]         b88b06f0b14fde0cbe79b93523bcfbe490df0215 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b88b06f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild