$ git clone -n https://github.com/fedora-riscv/libxc.git /var/lib/mock/f38-build-side-42-init-devel-1124196-30265/root/chroot_tmpdir/scmroot/libxc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1124196-30265/root/chroot_tmpdir/scmroot/libxc'...
$ git fetch origin 7d2ed1150420c50a7f43cce16b21fc9736d04185:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/libxc
 * [new ref]         7d2ed1150420c50a7f43cce16b21fc9736d04185 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d2ed11 Fix build on riscv64.