$ git clone -n https://src.fedoraproject.org/rpms/blis.git /var/lib/mock/f40-build-2239962-53628/root/chroot_tmpdir/scmroot/blis
Cloning into '/var/lib/mock/f40-build-2239962-53628/root/chroot_tmpdir/scmroot/blis'...
$ git fetch origin 5d649048d2b11e1b2d4310b76da7e7a58172db20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/blis
 * [new ref]         5d649048d2b11e1b2d4310b76da7e7a58172db20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d64904 - Update to 0.9.0