$ git clone -n https://src.fedoraproject.org/rpms/vboot-utils.git /var/lib/mock/f38-build-side-42-init-devel-1046769-29762/root/chroot_tmpdir/scmroot/vboot-utils
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1046769-29762/root/chroot_tmpdir/scmroot/vboot-utils'...
$ git fetch origin 5cf0fc542965cb563f123bb74e4569e2ca514fbe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vboot-utils
 * [new ref]         5cf0fc542965cb563f123bb74e4569e2ca514fbe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5cf0fc5 Update to upstream snapshot 9b08a3c4