$ git clone -n https://github.com/fedora-riscv/chromium.git /var/lib/mock/f38-build-side-42-init-devel-588521-26120/root/chroot_tmpdir/scmroot/chromium
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-588521-26120/root/chroot_tmpdir/scmroot/chromium'...
$ git fetch origin bd0ec5631f6526ce8835ae9a67a41370e254afef:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/chromium
 * [new ref]         bd0ec5631f6526ce8835ae9a67a41370e254afef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd0ec56 Add riscv64s support from Arch Linux.