$ git clone -n https://src.fedoraproject.org/rpms/ruby.git /var/lib/mock/f42-build-862871-171198/root/chroot_tmpdir/scmroot/ruby
Cloning into '/var/lib/mock/f42-build-862871-171198/root/chroot_tmpdir/scmroot/ruby'...
$ git fetch origin 186be743be6fa97b98f98edc739bbffbfe67e31d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ruby
 * [new ref]         186be743be6fa97b98f98edc739bbffbfe67e31d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 186be74 Add riscv64 information for checksec