$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-io.git /var/lib/mock/f40-build-2209969-52174/root/chroot_tmpdir/scmroot/apache-commons-io
Cloning into '/var/lib/mock/f40-build-2209969-52174/root/chroot_tmpdir/scmroot/apache-commons-io'...
$ git fetch origin 0bd19ac8fe77d88ac458577b2fbd24ec918a0dca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-io
 * [new ref]         0bd19ac8fe77d88ac458577b2fbd24ec918a0dca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0bd19ac Update javapackages test plan to f40