$ git clone -n https://src.fedoraproject.org/rpms/libXi.git /var/lib/mock/f45-build-15765-479/root/chroot_tmpdir/scmroot/libXi
Cloning into '/var/lib/mock/f45-build-15765-479/root/chroot_tmpdir/scmroot/libXi'...
$ git fetch origin d4fd33f773830c1ec062ef5aef51058775cd59c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXi
 * [new ref]         d4fd33f773830c1ec062ef5aef51058775cd59c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4fd33f Remove stale 'xmlto' and 'asciidoc' BuildRequires