$ git clone -n https://src.fedoraproject.org/rpms/psi-plus.git /var/lib/mock/f45-build-28993-634/root/chroot_tmpdir/scmroot/psi-plus
Cloning into '/var/lib/mock/f45-build-28993-634/root/chroot_tmpdir/scmroot/psi-plus'...
$ git fetch origin 4ac578ea0b0cefcb3a87142ca81c25c964203a0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/psi-plus
 * [new ref]         4ac578ea0b0cefcb3a87142ca81c25c964203a0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ac578e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild