$ git clone -n https://src.fedoraproject.org/rpms/bout++.git /var/lib/mock/f38-build-side-42-init-devel-1094562-30068/root/chroot_tmpdir/scmroot/bout++
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1094562-30068/root/chroot_tmpdir/scmroot/bout++'...
$ git fetch origin 035879d77159e95f5d3f94156ef230fc9d036a56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bout++
 * [new ref]         035879d77159e95f5d3f94156ef230fc9d036a56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 035879d Add workaround for non-x86 failure