$ git clone -n https://src.fedoraproject.org/rpms/iir1.git /var/lib/mock/f45-build-14049-456/root/chroot_tmpdir/scmroot/iir1
Cloning into '/var/lib/mock/f45-build-14049-456/root/chroot_tmpdir/scmroot/iir1'...
$ git fetch origin 990727d75561b99c7b1dd5b1b5c89010e7835467:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iir1
 * [new ref]         990727d75561b99c7b1dd5b1b5c89010e7835467 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 990727d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild