$ git clone -n http://fedora.riscv.rocks:3000/rpms/systemd.git /var/lib/mock/f39-build-730351-102673/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/f39-build-730351-102673/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin b28b4b7e654193a71a687efc6ad4ab71765fc5cb:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/systemd
 * [new ref]         b28b4b7e654193a71a687efc6ad4ab71765fc5cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b28b4b7 Properly check valgrind_arches