$ git clone -n https://src.fedoraproject.org/rpms/pocl.git /var/lib/mock/f40-build-2711134-71812/root/chroot_tmpdir/scmroot/pocl
Cloning into '/var/lib/mock/f40-build-2711134-71812/root/chroot_tmpdir/scmroot/pocl'...
$ git fetch origin a6b3a9eefb1e86e61ba87e1015ba1d41e8aabb69:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pocl
 * [new ref]         a6b3a9eefb1e86e61ba87e1015ba1d41e8aabb69 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6b3a9e Fixed FTBFS on i686 architecture.