$ git clone -n http://fedora.riscv.rocks:3000/rpms/systemd.git /var/lib/mock/f40-build-794236-139514/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/f40-build-794236-139514/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin 5d5b93fb40e457639feca1b3649333a7f1926ab0:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/systemd
 * [new ref]         5d5b93fb40e457639feca1b3649333a7f1926ab0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d5b93f Remove release_override