$ git clone -n http://fedora.riscv.rocks:3000/rpms/vtk.git /var/lib/mock/f42-build-865010-172748/root/chroot_tmpdir/scmroot/vtk
Cloning into '/var/lib/mock/f42-build-865010-172748/root/chroot_tmpdir/scmroot/vtk'...
$ git fetch origin 783238c68d7d25f2498eafc168821c0cc5041f70:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/vtk
 * [new ref]         783238c68d7d25f2498eafc168821c0cc5041f70 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 783238c Rebuild (no change)