$ git clone -n https://src.fedoraproject.org/rpms/pgrouting.git /var/lib/mock/f45-build-27854-626/root/chroot_tmpdir/scmroot/pgrouting
Cloning into '/var/lib/mock/f45-build-27854-626/root/chroot_tmpdir/scmroot/pgrouting'...
$ git fetch origin dbc1df0eac9049de6cad4b5a9f13f9cc9adecca5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pgrouting
 * [new ref]         dbc1df0eac9049de6cad4b5a9f13f9cc9adecca5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbc1df0 drop ix86 support