$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-codec.git /var/lib/mock/f40-build-2225628-52830/root/chroot_tmpdir/scmroot/apache-commons-codec
Cloning into '/var/lib/mock/f40-build-2225628-52830/root/chroot_tmpdir/scmroot/apache-commons-codec'...
$ git fetch origin 88db2204e4fb2180f5ce56582785c17e58b9ad7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-codec
 * [new ref]         88db2204e4fb2180f5ce56582785c17e58b9ad7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88db220 Update javapackages test plan to f40