$ git clone -n https://src.fedoraproject.org/rpms/libXaw.git /var/lib/mock/f40-build-2008784-45413/root/chroot_tmpdir/scmroot/libXaw
Cloning into '/var/lib/mock/f40-build-2008784-45413/root/chroot_tmpdir/scmroot/libXaw'...
$ git fetch origin f4ee03b9f6f19d8d19fd27de872b28985edd01db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXaw
 * [new ref]         f4ee03b9f6f19d8d19fd27de872b28985edd01db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4ee03b libXaw 1.0.15