$ git clone -n https://github.com/fedora-riscv/vtk.git /var/lib/mock/f39-build-2058662-49142/root/chroot_tmpdir/scmroot/vtk
Cloning into '/var/lib/mock/f39-build-2058662-49142/root/chroot_tmpdir/scmroot/vtk'...
$ git fetch origin f487f9711385f4aeb8ef6755f80a03f786e3597a:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/vtk
 * [new ref]         f487f9711385f4aeb8ef6755f80a03f786e3597a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f487f97 Merge remote-tracking branch 'fedoraproject/f39' into f39-rv64