$ git clone -n https://src.fedoraproject.org/rpms/plexus-cipher.git /var/lib/mock/f41-build-2030631-25291/root/chroot_tmpdir/scmroot/plexus-cipher
Cloning into '/var/lib/mock/f41-build-2030631-25291/root/chroot_tmpdir/scmroot/plexus-cipher'...
$ git fetch origin 670f8adc5617efb8ce5620461bc03bfb014d7078:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-cipher
 * [new ref]         670f8adc5617efb8ce5620461bc03bfb014d7078 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 670f8ad Switch javapackages tests to f41 branch