$ git clone -n https://src.fedoraproject.org/rpms/Xaw3d.git /var/lib/mock/f40-build-2216702-52511/root/chroot_tmpdir/scmroot/Xaw3d
Cloning into '/var/lib/mock/f40-build-2216702-52511/root/chroot_tmpdir/scmroot/Xaw3d'...
$ git fetch origin f82090de9f5cb5e56d42bfd12f0eb86835f74923:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/Xaw3d
 * [new ref]         f82090de9f5cb5e56d42bfd12f0eb86835f74923 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f82090d Backport upstream patches to fix C type errors