$ git clone -n https://src.fedoraproject.org/rpms/krename.git /var/lib/mock/f40-build-2165936-50976/root/chroot_tmpdir/scmroot/krename
Cloning into '/var/lib/mock/f40-build-2165936-50976/root/chroot_tmpdir/scmroot/krename'...
$ git fetch origin b0ebce299f323309a9104a19fd253e5dfd535f0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krename
 * [new ref]         b0ebce299f323309a9104a19fd253e5dfd535f0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0ebce2 Build against podofo-0.10