$ git clone -n https://src.fedoraproject.org/rpms/vxl.git /var/lib/mock/f46-build-135608-20716/root/chroot_tmpdir/scmroot/vxl
Cloning into '/var/lib/mock/f46-build-135608-20716/root/chroot_tmpdir/scmroot/vxl'...
$ git fetch origin 799260d8a1dcfc502baa1f22e42672e4c46eca1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vxl
 * [new ref]         799260d8a1dcfc502baa1f22e42672e4c46eca1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 799260d Fix linking issue on RISC-V